Filed Pursuant to Rule 424(b)(3)
Registration Statement Nos.: 333-228369
and 333-228369-01

PROSPECTUS

BP Capital Markets America Inc.

Offers to Exchange Any and All of

the Outstanding Notes of each Series Specified Below

up to the Maximum Amount (as defined below)

Early Participation Deadline: 5:00 p.m., New York City Time, November 28, 2018, unless extended

Expiration Time: 11:59 p.m., New York City Time, December 12, 2018, unless extended

Subject to the conditions described in this Prospectus, including the applicable Minimum Size Condition and the Maximum Amount Condition (as defined below), we are offering to exchange any validly tendered (and not validly withdrawn) and accepted notes, subject to the priorities set forth herein, of the following series of notes issued by BP Capital Markets p.l.c. (“BP Capital U.K.”) (the “Old Notes”), for notes on substantially identical terms to be issued by BP Capital Markets America Inc. (“BP Capital America”) and fully and unconditionally guaranteed by BP p.l.c. (“BP”) (the “New Notes”), as described in, and for the consideration summarized in, the table below (the “Exchange Offers” and each, an “Exchange Offer”). As described below, no series of Old Notes will be subject to proration pursuant to the Exchange Offers.

The Exchange Offers are subject to Acceptance Priority Levels and the conditions described herein, including the applicable Minimum Size Condition and the Maximum Amount Condition, as described further below. Subject to applicable law, we reserve the right, but are under no obligation, to increase or decrease the Maximum Amount at any time, which, in the event of an increase, could result in the exchange of a greater aggregate principal amount of Old Notes. See “The Exchange Offers—Extensions; Amendments; Waiver; Termination.”

The aggregate principal amount of each series of Old Notes that is exchanged in the Exchange Offers will be determined in accordance with the acceptance priority levels detailed in the table above (the “Acceptance Priority Levels”), with Acceptance Priority Level 1 being the highest and Acceptance Priority Level 23 being the lowest. No Old Fixed Rate Notes (being the Old Notes with Acceptance Priority Levels 1 through 19, 22 and 23, collectively the “Old Fixed Rate Notes”) of a given series will be accepted for exchange unless the aggregate principal amount of New Notes to be issued on the Settlement Date in exchange for such series of Old Fixed Rate Notes is greater than or equal to the applicable minimum new notes size detailed in the table above (the “Minimum New Notes Size” and, such condition, the “Minimum Size Condition”). Additionally, no Old Notes of a given series will be accepted for exchange unless $10,600,000,000 (the “Maximum Amount”) is greater than or equal to the sum of (i) the aggregate principal amount of such series of Old Notes validly tendered and not validly withdrawn and (ii) the aggregate principal amount of all series of Old Notes having a higher Acceptance Priority Level which have been accepted for exchange (the “Maximum Amount Condition”). If either of the Minimum Size Condition or the Maximum Amount Condition is not satisfied with respect to a given series of Old Notes, then (i) no Old Notes of that series will be accepted for exchange (whether or not validly tendered) and (ii) the series of Old Notes (if any) with the next lowest Acceptance Priority Level that satisfies both the Minimum Size Condition and the Maximum Amount Condition will be accepted for exchange, until there is no series of Old Notes with a lower Acceptance Priority Level to consider for exchange. Satisfaction of the

Maximum Amount Condition will be tested at the Expiration Time for each series in order of Acceptance Priority Level. If any series of Old Notes is accepted for exchange, all Old Notes of that series that are validly tendered and not validly withdrawn will be accepted for exchange. Accordingly, no series of Old Notes will be subject to proration pursuant to the Exchange Offers.

It is possible that any series of Old Notes with Acceptance Priority Level 10 or lower will fail to meet the Maximum Amount Condition and therefore will not be accepted for exchange even if one or more series with a lower Acceptance Priority Level is accepted for exchange.

In exchange for each $1,000 principal amount of Old Notes that is validly tendered prior to 5:00 p.m., New York City time, on November 28, 2018 (the “Early Participation Deadline”) and not validly withdrawn (subject to the Acceptance Priority Levels and the conditions described herein, including the applicable Minimum Size Condition and the Maximum Amount Condition), holders will receive the total consideration set out in the table above (the “Total Consideration”), which consists of $1,000 principal amount of New Notes and a cash amount of $1 (such cash amount, the “Cash Component”).

The Total Consideration includes an early participation premium set out in the table above (the “Early Participation Premium”), which consists of $30 principal amount of New Notes.

In exchange for $1,000 principal amount of Old Notes that is validly tendered after the Early Participation Deadline but prior to the Expiration Time (as defined below) and not validly withdrawn (subject to the Acceptance Priority Levels and the conditions described herein, including the applicable Minimum Size Condition and the Maximum Amount Condition), holders will receive only the exchange consideration set out in the table above (the “Exchange Consideration”), which is equal to the Total Consideration less the Early Participation Premium and so consists of $970 principal amount of New Notes and a cash amount of $1.

Other than the identity of the Issuer, the terms of each series of the New Notes are identical in all material respects to the corresponding series of Old Notes, with minor exceptions as discussed in “Description of Differences Between the New Notes and the Old Notes.” The Old Notes are, and each series of the New Notes will be, fully and unconditionally guaranteed by BP. Each series of the New Notes will have the same financial terms and covenants as the corresponding series of Old Notes, and are subject to the same business and financial risks. The Old Notes were issued pursuant to supplemental indentures to an indenture, dated March 8, 2002, amongst BP Capital U.K., BP and The Bank of New York Mellon Trust Company, N.A. (as successor to JPMorgan Chase Bank, N.A.), as trustee (the “Trustee”) (such indenture, as supplemented, the “Old Indenture”). The New Notes will be issued pursuant to a supplemental indenture to an indenture dated June 4, 2003, among BP Capital America, BP and the Trustee (such indenture, as will be supplemented, the “New Indenture” and together with the Old Indenture, the “Indentures”).

Subject to the rounding described below, no accrued but unpaid interest will be paid on the Old Notes in connection with the Exchange Offers. However, interest on the applicable New Note will accrue from and including the most recent interest payment date of the tendered Old Note. The principal amount of each New Note will be rounded down, if necessary, to the nearest whole multiple of $1,000, and we will pay cash equal to the remaining portion (plus accrued interest thereon), if any, of the exchange price of such Old Note. The Exchange Offers will expire at 11:59 p.m., New York City time, on December 12, 2018, unless extended (the “Expiration Time”). You may withdraw tendered Old Notes at any time prior to the Expiration Time. As of the date of this prospectus, there was $23,750,000,000 aggregate principal amount of outstanding Old Notes.

The consummation of each Exchange Offer is subject to, and conditional upon, the satisfaction or waiver, where permitted, of the conditions discussed under “The Exchange Offers—Terms of the Exchange Offers” and “The Exchange Offers—Conditions to the Exchange Offers,” including, among other things, the Minimum Size Condition and the Maximum Amount Condition. Subject to applicable law and as described under “The Exchange Offers—Extensions; Amendments; Waiver; Termination,” we may, at our option and sole discretion, waive any such conditions with respect to any of the Exchange Offers, except the condition that the registration statement of which this prospectus forms a part has been declared effective by the U.S. Securities and Exchange Commission. All conditions to the Exchange Offers must be satisfied or, where permitted, waived, at or by the Expiration Time.

We plan to issue the New Notes promptly on or about the second business day following the Expiration Time (the “Settlement Date”). The Old Notes are currently, and we intend will remain, listed on the New York Stock Exchange (“NYSE”), and we intend to list the New Notes on the NYSE. We expect trading in the New Notes on the NYSE to begin within 30 days of the Settlement Date.

This investment involves risks. Prior to participating in any of the Exchange Offers, please see the section entitled “Risk Factors” beginning on page 11 of this prospectus for a discussion of the risks that you should consider. Additionally, see the sections entitled “Risk Factors” in our 2017 Annual Report on Form 20-F for the fiscal year ended December 31, 2017 and “Principal risks and uncertainties” in our Report on Form 6-K filed with the SEC on July 31, 2018, which are incorporated by reference herein, to read about factors you should consider before investing in the New Notes.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of these securities or determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

None of BP, BP Capital America, BP Capital U.K., the Exchange Agent, the Information Agent, the Trustee or the Dealer Managers makes any recommendation as to whether holders of Old Notes should exchange their notes in the Exchange Offers.

The Dealer Managers for the Exchange Offers are:

The date of this prospectus is December 10, 2018.

TABLE OF CONTENTS

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ABOUT THIS PROSPECTUS

In this prospectus, the terms “we,” “us,” and “our” refer to BP p.l.c., BP Capital Markets America Inc. and BP Capital Markets p.l.c., “BP” or “Guarantor” refers to BP p.l.c.; “BP Group” refers to BP and its subsidiaries; “BP Capital America” or “Issuer” refers to BP Capital Markets America Inc.; “BP Capital U.K.” refers to BP Capital Markets p.l.c.

No person is authorized to give any information or to make any representations other than those contained or incorporated by reference in this prospectus. We and the Dealer Managers take no responsibility for, and can provide no assurance as to the reliability of, any other information that others may give you. This prospectus is not an offer to sell or the solicitation of an offer to buy any securities in any jurisdiction where it is unlawful. The delivery of this prospectus will not, under any circumstances, create any implication that there has been no change in our affairs since the date of this prospectus or that the information contained or incorporated by reference is correct as of any time subsequent to the date of such information. Our business, financial condition, results of operations and prospects may have changed since those dates.

This prospectus is part of a registration statement that we have filed with the U.S. Securities and Exchange Commission (the “SEC” or the “Commission”). Prior to making any decision with respect to the Exchange Offers, you should read this prospectus and any prospectus supplement, together with the documents incorporated by reference herein, the registration statement, the exhibits thereto and the additional information described under the heading “Where You Can Find More Information.”

References in this prospectus to “$,” “US$,” “USD” and “U.S. dollars” are to the lawful currency of the United States of America.

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING STATEMENTS

In order to utilize the “safe harbor” provisions of the United States Private Securities Litigation Reform Act of 1995 (the “PSLRA”) and the general doctrine of cautionary statements, BP is providing the following cautionary statement. This prospectus, including documents incorporated by reference, and the related prospectus supplement may contain certain forecasts, projections and forward-looking statements - that is, statements related to future, not past, events and circumstances - with respect to the financial condition, results of operations and businesses of BP and certain of the plans and objectives of BP with respect to these items. These statements may generally, but not always, be identified by the use of words such as “will”, “expects”, “is expected to”, “aims”, “should”, “may”, “objective”, “is likely to”, “intends”, “believes”, “anticipates”, “plans” “we see” or similar expressions. By their nature, forward-looking statements involve risk and uncertainty because they relate to events and depend on circumstances that will or may occur in the future and are outside the control of BP. Actual results may differ materially from those expressed in such statements, depending on a variety of factors, including: the specific factors identified in the discussions accompanying such forward-looking statements; the receipt of relevant third party and/or regulatory approvals; the timing and level of maintenance and/or turnaround activity; the timing and volume of refinery additions and outages; the timing of bringing new fields onstream; the timing, quantum and nature of certain divestments; future levels of industry product supply, demand and pricing, including supply growth in North America; OPEC quota restrictions; production-sharing agreements effects; operational and safety problems; potential lapses in product quality; economic and financial market conditions generally or in various countries and regions; political stability and economic growth in relevant areas of the world; changes in laws and governmental regulations and policies, including related to climate change; changes in social attitudes and customer preferences; regulatory or legal actions including the types of enforcement action pursued and the nature of remedies sought or imposed; the actions of prosecutors, regulatory authorities and courts; delays in the processes for resolving claims; amounts ultimately payable and the timing of payments relating to the Gulf of Mexico oil spill; exchange rate fluctuations; development and use of new technology; recruitment and retention of a skilled workforce; the success or otherwise of partnering; the actions of competitors, trading partners, contractors, subcontractors, creditors, rating agencies and others; our access to future credit resources; business disruption and crisis management; the impact on our reputation of ethical misconduct and non-compliance with regulatory obligations; trading losses; major uninsured losses; decisions by Rosneft’s management and board of directors; the actions of contractors; natural disasters and adverse weather conditions; changes in public expectations and other changes to business conditions; wars and acts of terrorism; cyber attacks or sabotage; and other factors discussed elsewhere in this prospectus including under “Risk Factors”. In addition to factors set forth elsewhere in this prospectus, those set out above are important factors, although not exhaustive, that may cause actual results and developments to differ materially from

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those expressed or implied by these forward-looking statements. Any forward-looking statements made by or on BP’s behalf speak only as of the date they are made. BP does not undertake to update forward-looking statements to reflect any changes to its expectations or any changes in events, conditions or circumstances on which any such statement is based. Additional information, including information on factors which may affect BP’s business, is contained in BP’s Annual Report on Form 20-F for the fiscal year ended December 31, 2017, including under the heading “Risk Factors”, and in the Report on Form 6-K filed with the SEC on July 31, 2018, including under the heading “Principal risks and uncertainties”.

WHERE YOU CAN FIND MORE INFORMATION

BP files annual and current reports and other information with the SEC. The SEC maintains an internet site at http://www.sec.gov that contains reports and other information regarding issuers, including BP, that file electronically with the SEC. BP’s SEC filings are also available on BP’s website at http://www.bp.com. Any other information contained on any website referenced in this prospectus is not incorporated by reference in this prospectus.

BP’s American Depositary Shares are listed on the New York Stock Exchange. BP’s ordinary shares are admitted to trading on the London Stock Exchange and are also listed on the Frankfurt Stock Exchange in Germany. You can consult reports and other information about BP that it files pursuant to the rules of the London Stock Exchange and the New York Stock Exchange at these exchanges.

This prospectus is part of a registration statement and constitutes a prospectus of BP. As allowed by SEC rules, this prospectus does not contain all of the information you can find in the registration statement or the exhibits to the registration statement. You may inspect and copy the registration statement at any of the addresses listed above. The SEC allows BP to “incorporate by reference” information into this prospectus. This means BP can disclose important information to you by referring you to another document separately filed with the SEC. The information incorporated by reference is considered a part of this prospectus, except for any information superseded by information in this prospectus. In addition, any later information that BP files with the SEC will automatically update and supersede this information. This prospectus incorporates by reference the documents listed below that BP has previously filed with the SEC. These documents contain important information, including about BP.

You should rely only on the information contained in this prospectus or that we have referred to you. BP has not authorized anyone to provide you with any additional information. This prospectus is dated as of the date listed on the cover page. You should not assume that the information contained in this prospectus is accurate as of any date other than such date.

We incorporate by reference the documents listed below and any future filings we will make with the SEC under Section 13(a), 13(c), 14 or 15(d) of the Exchange Act after the date of this prospectus and until we complete the Exchange Offers (other than, in each case, documents or information deemed to have been furnished and not filed in accordance with SEC rules):

To the extent this prospectus, or the documents or information incorporated by reference into this prospectus, contains references to the Internet website of BP, the information on such website does not constitute a part of, and is not incorporated by reference into, this prospectus.

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Documents incorporated by reference are available from the SEC as described above or from us without charge, or from the Information Agent, excluding exhibits to those documents unless the exhibit is specifically incorporated by reference as an exhibit in this document. The Information Agent may be contacted at the address set forth on the back cover of this prospectus. You may request a copy of this prospectus and any of the documents incorporated by reference into this prospectus or other information concerning BP, without charge, upon written or oral request. You should direct your requests to BP p.l.c., 1 St. James’s Square London SW1Y 4PD, United Kingdom (telephone: +44-20-7496-4000).

To receive timely delivery of the documents prior to the Early Participation Deadline, you should make your request no later than November 20, 2018. To receive timely delivery of the documents prior to the Expiration Time, you should make your request no later than December 5, 2018.

Any statement contained in a document incorporated or deemed to be incorporated by reference into this prospectus will be deemed to be modified or superseded for purposes of this prospectus to the extent that a statement contained in this prospectus or any other subsequently filed document that is deemed to be incorporated by reference into this prospectus modifies or supersedes the statement. Any statement so modified or superseded will not be deemed, except as so modified or superseded, to constitute a part of this prospectus. Any statement concerning the contents of any contract or other document filed as an exhibit to the registration statement is not necessarily complete. With respect to each contract or other document filed as an exhibit to the registration statement, you are referred to that exhibit for a more complete description of the matter involved, and each such statement is qualified in its entirety by such reference.

IMPORTANT DATES

Please take note of the following important dates and times in connection with the Exchange Offers. These dates assume no extension of the Early Participation Deadline or the Expiration Time.

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RISK FACTORS

Participation in the Exchange Offers involves a high degree of risk, including, but not limited to, the risks described below. In addition, you should carefully consider, among other things, the risks described in the documents incorporated by reference into this prospectus. The risks and uncertainties described below and in the foregoing documents are not the only risks and uncertainties we face. Additional risks and uncertainties not presently known to us or that we currently deem immaterial may also impair our business operations. If any of the following risks actually occur, our business, financial condition and results of operations could suffer. As a result, the trading price of the New Notes could decline, perhaps significantly, and you could lose all or part of your investment. The risks discussed below also include forward-looking statements and our actual results may differ substantially from those discussed in these forward-looking statements. See “Cautionary Statement Regarding Forward-Looking Statements.”

Risks relating to BP’s business

You should read “Risk factors” in BP’s Annual Report on Form 20-F for the fiscal year ended December 31, 2017, and “Principal risks and uncertainties” in BP’s Report on Form 6-K for the three months and six months ended June 30, 2018, filed on July 31, 2018, each of which is incorporated by reference in this prospectus, or similar sections in subsequent filings incorporated by reference in this prospectus, for information on risks relating to our business.

Risks Relating to the New Notes

The New Notes are unsecured and your right to receive payments on the New Notes may be adversely affected by prior ranking claims.

The New Notes will be unsecured. If BP Capital America defaults on the New Notes or BP defaults on the Guarantees, or in the event of any bankruptcy, liquidation or reorganization of BP Capital America or BP, then, to the extent that BP Capital America or BP have granted security over their assets in respect of any of their obligations, the secured assets will be applied to satisfy those obligations before satisfaction of any payment obligations of BP Capital America or BP in respect of the New Notes or the Guarantees. There may only be limited assets available to make payments on the New Notes or the Guarantees in the event of an acceleration of the New Notes or any bankruptcy, liquidation or reorganization of BP Capital America or BP. If there is not enough collateral to satisfy all secured obligations, then any remaining amounts payable in respect of secured obligations would share equally with all unsubordinated unsecured obligations, including payment obligations in respect of the New Notes and the Guarantees.

BP Capital America and BP can incur significantly more debt in the future, and your rights may be inferior to the rights of holders of that debt.

BP Capital America and BP may each incur substantial additional indebtedness in the future, some or all of which may be secured by assets of BP Capital America, BP and/or their respective subsidiaries. The terms of the New Notes will not limit the amount of indebtedness the BP Group may incur. Any such incurrence of additional indebtedness could have significant effects on the future operations of BP Capital America and BP because of the potentially significant cash requirements to service that debt, which could limit funds available for operations and future business opportunities and increase the vulnerability of BP Capital America and BP to adverse general economic and industry conditions or lower oil and gas prices. Any such additional indebtedness would also generally exacerbate the other risks that holders of the New Notes now face.

In addition, the New Indenture does not restrict BP Capital America and BP from issuing debt securities in the future that provide holders with rights superior to the rights already granted, or that may be granted in the future, to holders of the New Notes. BP Capital America and BP may also incur indebtedness in the future under different instruments. All of this additional indebtedness incurred in the future under the New Indenture or otherwise may rank senior to the New Notes.

BP is a holding company, so its obligations as Guarantor are structurally subordinated to liabilities of its subsidiaries.

BP is organized as a holding company, and substantially all of its operations are carried out through subsidiaries. BP’s ability to meet its financial obligations is dependent upon the availability of cash flows from its

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domestic and foreign subsidiaries and affiliated companies through dividends, intercompany advances and other payments. No member of the BP Group (other than BP Capital America and BP) has any obligation, contingent or otherwise, to pay any amounts due under the New Notes or to make funds available to BP Capital America or BP to enable either of them to pay any amounts due under the New Notes or the guarantee. Moreover, BP’s subsidiaries and affiliated companies are not required, and may not be able, to pay dividends to BP. Claims of the creditors of BP’s subsidiaries have priority as to the assets of such subsidiaries over the claims of BP. Consequently, in the event of insolvency of BP, the claims of holders of the New Notes under the Guarantees would be structurally subordinated to the prior claims of the creditors of subsidiaries of BP. Moreover, subsidiaries of BP incorporated under the laws of England and Wales may be restricted by law in their ability to declare dividends due to failure to meet requirements tied to net asset levels or distributable profits.

A ratings decline could adversely affect the value of the New Notes.

Each of the rating agencies that rate the debt of BP Capital America and BP has the ability to lower the ratings currently assigned to that debt as a result of its views about the BP Group’s current or future business, financial condition, results of operations or other matters. Any ratings decline could adversely affect the value of the New Notes.

In addition, the credit ratings ascribed to the BP Group and the New Notes are intended to reflect the ability of BP Capital America and BP to meet their respective repayment obligations in respect of the New Notes and the Guarantees, and may not reflect the potential impact of all risks related to the structure, the market, the BP Group and other factors on the value of the New Notes.

A credit rating is not a recommendation to buy, sell or hold securities and may be subject to revision or withdrawal at any time by the assigning rating organization. Each rating should be evaluated independently of any other rating.

Uncertainty relating to the calculation of LIBOR and its potential discontinuance may materially adversely affect the value of the New Floating Rate Notes.

On July 27, 2017, the Chief Executive of the U.K. Financial Conduct Authority (the “FCA”), which regulates the London Interbank Offered Rate (“LIBOR”), announced that the FCA will no longer persuade or compel banks to submit rates for the calculation of LIBOR after 2021. Such announcement indicates that the continuation of LIBOR on the current basis cannot and will not be guaranteed after 2021. Notwithstanding the foregoing, it appears highly likely that LIBOR will be discontinued or modified by 2022.

At this time, it is not possible to predict the effect that these developments, any discontinuance, modification or other reforms to LIBOR, or the establishment of alternative reference rates, may have on LIBOR or floating rate debt securities, including the New Floating Rate Notes. Uncertainty as to the nature of such potential discontinuance, modification, alternative reference rates or other reforms may materially adversely affect the trading market for securities linked to LIBOR, including the New Floating Rate Notes. Furthermore, the use of alternative reference rates or other reforms could cause the interest rate calculated for the New Floating Rate Notes to be materially different than expected.

Transactions in the debt securities may be subject to the European Union financial transaction tax, if introduced.

On February 14, 2013, the European Commission published a proposal (the “Commission’s Proposal”) for a Directive for a common financial transaction tax (the “FTT”) in Belgium, Germany, Estonia, Greece, Spain, France, Italy, Austria, Portugal, Slovenia and Slovakia (the “Participating Member States”). Estonia has since announced, however, that it will not participate in the FTT.

The Commission’s Proposal has very broad scope and could, if introduced, apply to certain dealings in the New Notes (including secondary market transactions) in certain circumstances.

Under the Commission’s Proposal the FTT could apply in certain circumstances to persons both within and outside of the Participating Member States. Generally, it would apply to certain dealings in the New Notes where at least one party is a financial institution, and at least one party is established in a Participating Member State. A financial institution may be, or be deemed to be, “established” in a Participating Member State in a broad range of circumstances, including (a) by transacting with a person established in a Participating Member State or (b) where the financial instrument which is subject to the dealings is issued in a Participating Member State.

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The FTT proposal remains subject to negotiation between the Participating Member States and the scope of any such tax is uncertain. The timing of further negotiations between the Participating Member States of the European Union and the implementation of the FTT is currently unclear. Additional EU member states may decide to participate and/or certain of the Participating Member States may decide to withdraw.

Prospective holders of the New Notes are advised to seek their own professional advice in relation to the FTT.

Risks Relating to the Exchange Offers

Our board of directors has not made a recommendation as to whether you should tender your Old Notes in exchange for New Notes in the Exchange Offers, and we have not obtained a third-party determination that the Exchange Offers are fair to holders of our Old Notes.

Our board of directors has not made, and will not make, any recommendation as to whether holders of Old Notes should tender their Old Notes in exchange for New Notes pursuant to the Exchange Offers. We have not retained, and do not intend to retain, any unaffiliated representative to act solely on behalf of the holders of the Old Notes for purposes of negotiating the terms of these Exchange Offers, or preparing a report or making any recommendation concerning the fairness of these Exchange Offers. Therefore, if you tender your Old Notes, you may not receive more than or as much value as if you chose to keep them. Holders of Old Notes must make their own independent decisions regarding their participation in the Exchange Offers.

Upon consummation of the Exchange Offers, holders who exchange Old Notes will lose their rights under such Old Notes.

If you tender Old Notes and your Old Notes are accepted for exchange pursuant to the Exchange Offers, you will lose all of your rights as a holder of the exchanged Old Notes, including, without limitation, your right to future interest and principal payments with respect to the exchanged Old Notes. See “—Risks Relating to the New Notes” above for more information.

A U.S. holder will generally recognize gain or loss on the exchange of Old Notes for New Notes.

Although the matter is not free from doubt, any exchange of Old Notes for New Notes pursuant to the Exchange Offers should constitute a significant modification of the terms of the Old Notes and therefore be treated as a taxable disposition of the Old Notes in exchange for the New Notes for U.S. federal income tax purposes. If treated as such, a U.S. Holder (as defined in “Material U.S. Federal Income Tax Considerations—Tax Consequences to Exchanging U.S. Holders”) that tenders the Old Notes in exchange for the New Notes will generally recognize gain or loss for U.S. federal income tax purposes. See “Material U.S. Federal Income Tax Considerations—Tax Consequences to Exchanging U.S. Holders—The Exchange Offers.”

The outstanding aggregate principal amount of any series of Old Notes after the Exchange Offers may be significantly reduced, the liquidity of any trading market that currently exists for the Old Notes may be adversely affected by the Exchange Offers, and holders of Old Notes who fail to participate in the Exchange Offers may find it more difficult to sell their Old Notes after the Exchange Offers are completed.

To the extent that Old Notes are tendered and accepted for exchange pursuant to the Exchange Offers, the trading markets for the remaining Old Notes will become more limited or may cease to exist altogether. A debt security with a small outstanding aggregate principal amount, or “float,” may command a lower price than would a comparable debt security with a larger float. Therefore, the market price for the remaining Old Notes may be adversely affected. The reduced float may also make the trading prices of the remaining Old Notes more volatile.

Some of the Old Notes you tender may not be exchanged.

If acceptance of all validly tendered Old Notes of a particular series (together with all accepted Old Notes with a greater acceptance priority to such series) would cause us to accept a principal amount of Old Notes greater than the Maximum Amount, then the Maximum Amount Condition will not be satisfied with respect to such series of Old Notes and the Exchange Offers will be oversubscribed. It is possible that any series of Old Notes with Acceptance Priority Level 10 or lower will fail to meet the Maximum Amount Condition and therefore will not be accepted for exchange even if one or more series with a lower Acceptance Priority Level is accepted for exchange. Additionally, no series of Old Fixed Rate Notes will be accepted for exchange unless the aggregate principal amount of New Notes to be issued on the Settlement Date in exchange for such series of Old Fixed Rate Notes is greater than or

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equal to the applicable Minimum New Notes Size. See “The Exchange Offers—Terms of the Exchange Offers”, “The Exchange Offers—Maximum Amount; Acceptance Priority Levels” and “The Exchange Offers—Conditions to the Exchange Offers.”

We reserve the right to increase or decrease the Maximum Amount.

Subject to applicable law, we reserve the right, but are not obligated, to increase or decrease the Maximum Amount in our sole and absolute discretion. We will promptly announce any increase or decrease in the Maximum Amount by a press release. As discussed under “The Exchange Offers—Extensions; Amendments; Waiver; Termination”, in the event of any such change, we may choose to, or be obliged by applicable law to, extend one or more of the Early Participation Deadline or Expiration Time. If we increase the Maximum Amount after the Early Participation Deadline and do not extend the Early Participation Deadline, and you wish to participate in the Exchange Offers after the Early Participation Deadline, you will not receive the Total Consideration.

The Exchange Offers may be cancelled or delayed.

The consummation of each Exchange Offer is subject to, and conditional upon, the satisfaction or waiver of the conditions discussed under “The Exchange Offers—Terms of the Exchange Offers” and “The Exchange Offers—Conditions to the Exchange Offers”, including, among other things, the Minimum Size Condition and the Maximum Amount Condition (see “—Some of the Old Notes you tender may not be exchanged.”) and that the registration statement on Form F-4 of which this prospectus forms a part has been declared effective. If the conditions are not satisfied then one or more of the Exchange Offers may be cancelled. We may, however, at our option and in our sole discretion, subject to applicable law and as described under “The Exchange Offers—Extensions; Amendments; Waiver; Termination”, waive any such conditions to any of the Exchange Offers, except the condition that the registration statement of which this prospectus forms a part has been declared effective by the SEC. Even if the Exchange Offers are completed, the Exchange Offers may not be completed on the schedule described in this prospectus. Accordingly, holders participating in the Exchange Offers may have to wait longer than expected to receive their New Notes and the cash consideration during which time those holders of the Old Notes will not be able to effect transfers of their Old Notes tendered for exchange.

You may not receive New Notes in the Exchange Offers if the applicable procedures for the Exchange Offers are not followed.

We will issue the New Notes in exchange for your Old Notes only if you tender your Old Notes and deliver properly completed documentation for the applicable Exchange Offer. For any Exchange Offer relating to Old Notes, you must electronically transmit your acceptance through DTC’s ATOP and deliver any other required documents to the Exchange Agent before expiration of the Exchange Offers. There will be no letter of transmittal for this offer. See “The Exchange Offers—Procedures for Tendering Old Notes” for a description of the procedures to be followed to tender your Old Notes.

You should allow sufficient time to ensure delivery of the necessary documents. None of the Issuer, the Exchange Agent, the Information Agent, the Dealer Managers or any other person is under any duty to give notification of defects or irregularities with respect to the tenders of the Old Notes for exchange.

If you tender your Old Notes after the Early Participation Deadline, and your Old Notes are accepted for exchange, you will only receive the Exchange Consideration.

Holders who validly tender their Old Notes after the Early Participation Deadline and whose Old Notes are accepted for exchange will only receive the Exchange Consideration, and will not receive the Early Participation Premium of $30 principal amount of New Notes for each $1,000 principal amount of Old Notes validly tendered and not validly withdrawn.

Failure to complete any of the Exchange Offers successfully could negatively affect the prices of the applicable Old Notes.

Several conditions must be satisfied or waived in order to complete each of the Exchange Offers. The conditions to the Exchange Offers may not be satisfied, and if not satisfied or waived (subject to applicable law, to the extent that the conditions may be waived, see “The Exchange Offers—Extensions; Amendments; Waiver; Termination”) the Exchange Offers may not occur or may be delayed. If the Exchange Offers are not completed or are delayed, the respective market prices of any or all of the series of Old Notes may decline to the extent that the respective current market prices reflect an assumption that the Exchange Offers have been or will be completed.

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We may repurchase any Old Notes that are not tendered in the Exchange Offers on terms that are more favorable to the holders of the Old Notes than the terms of the Exchange Offers.

We or our affiliates may, to the extent permitted by applicable law, after the Expiration Time of the Exchange Offers, acquire Old Notes that are not tendered and accepted in the Exchange Offers through open market purchases, privately negotiated transactions, tender offers, exchange offers, redemption or otherwise, upon such terms and at such prices as we may determine, which with respect to the Old Notes may be more or less favorable to holders than the terms of the Exchange Offers. There can be no assurance as to which, if any, of these alternatives or combinations thereof we or our affiliates may choose to pursue in the future.

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USE OF PROCEEDS

We will not receive any proceeds from the exchanges of the New Notes for the Old Notes pursuant to the Exchange Offers. In exchange for issuing the New Notes and paying the cash consideration, we will receive the tendered Old Notes. The Old Notes surrendered in connection with the Exchange Offers will be retired and cancelled.

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THE EXCHANGE OFFERS

Purpose of the Exchange Offers

BP is conducting the Exchange Offers to efficiently migrate Old Notes from BP Capital U.K. to BP Capital America in order to optimize the BP Group’s capital structure and align revenue generation to indebtedness. This follows recent efforts by BP to issue U.S. debt from BP Capital America, as demonstrated by BP’s most recent U.S. issuance activity.

The following diagram illustrates in simplified terms the structure of the BP Group, including BP Capital America and BP Capital U.K.

Terms of the Exchange Offers

Upon the terms and subject to the conditions set forth in this prospectus, we are offering to exchange the series of notes issued by BP Capital U.K. (the “Old Notes”) set forth in the table below for the applicable series of new notes to be issued by BP Capital America and fully and unconditionally guaranteed by BP (the “New Notes”) set forth in the table below, in the manner and amounts described herein (the “Exchange Offers” and each, an “Exchange Offer”), with the maximum combined aggregate principal amount of Old Notes that we can accept being a combined aggregate principal amount equal to $10,600,000,000 (the “Maximum Amount”). The series of Old Notes that will be accepted for exchange will be determined in accordance with the Acceptance Priority Levels mechanism (described below under “—Maximum Amount; Acceptance Priority Levels”), subject to the Minimum Size Condition and the Maximum Amount Condition (described below under “—Conditions to the Exchange Offers”).

If either of the Minimum Size Condition or the Maximum Amount Condition is not satisfied with respect to a given series of Old Notes, then (i) no Old Notes of that series will be accepted for exchange (whether or not validly tendered) and (ii) the series of Old Notes (if any) with the next lowest Acceptance Priority Level that satisfies both the Minimum Size Condition and the Maximum Amount Condition will be accepted for exchange, until there is no series of Old Notes with a lower Acceptance Priority Level to consider for exchange. Satisfaction of the Maximum Amount Condition will be tested at the Expiration Time for each series in order of Acceptance Priority Level. It is possible that any series of Old Notes with Acceptance Priority Level 10 or lower will fail to meet the Maximum Amount Condition and therefore will not be accepted for exchange even if one or more series with a lower Acceptance Priority Level is accepted for exchange. If any series of Old Notes is accepted for exchange, all Old

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Notes of that series that are validly tendered and not validly withdrawn will be accepted for exchange. As a result, no series of Old Notes accepted for exchange will be prorated.

In the Exchange Offers, we are offering in exchange for a holder’s outstanding Old Notes the following New Notes:

Specifically, (i) in exchange for each $1,000 principal amount of Old Notes that is validly tendered prior to 5:00 p.m., New York City time, on the Early Participation Deadline, and not validly withdrawn (and subject to the applicable minimum denominations), holders will receive $1,000 principal amount of New Notes and a cash amount of $1 (such cash amount, the “Cash Component” and, together with the New Notes, the “Total Consideration”) and (ii) in exchange for each $1,000 principal amount of Old Notes that is validly tendered after the Early Participation Deadline but prior to the Expiration Time and not validly withdrawn (and subject to the applicable minimum denominations), holders will receive only the “Exchange Consideration”, which is equal to the Total Consideration less the Early Participation Premium (as defined below) and so consists of $970 principal amount of New Notes and the Cash Component, in each case, subject to the Acceptance Priority Levels and the conditions described herein, including the applicable Minimum Size Condition and the Maximum Amount Condition (each as defined below).

The Total Consideration includes an early participation premium set out in the table above (the “Early Participation Premium”), which consists of $30 principal amount of New Notes.

We reserve the right, but are not obligated, to increase or decrease the Maximum Amount in our sole discretion (see “—Extensions; Amendments; Waiver; Termination” below). The Exchange Offers are conditioned upon certain conditions (as described herein and below under “—Conditions to the Exchange Offers”), including the applicable Minimum Size Condition and the Maximum Amount Condition. We expressly reserve the right, in our sole and absolute discretion, subject to applicable law and as described under “—Extensions; Amendments; Waiver; Termination” below, to waive any condition to any of the Exchange Offers, (except the condition that the registration statement of which this prospectus forms a part has been declared effective by the SEC), or to terminate the Exchange Offer in respect of any series of Old Notes if the conditions described under “—Conditions to the Exchange Offers” are not satisfied or waived by the Expiration Time. All conditions to the Exchange Offers must be satisfied or, where permitted, waived, at or by the Expiration Time.

The New Notes will be issued only in minimum denominations of $1,000 and whole multiples of $1,000 thereafter. See “Description of the New Notes and Guarantees—General.” We will not accept tenders of Old Notes

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if such tender would result in the holder thereof receiving in the applicable Exchange Offer an amount of New Notes below the applicable minimum denomination. If the Issuer would be required to issue a New Note in a denomination other than $1,000 or a whole multiple of $1,000 above such minimum denomination, the Issuer will, in lieu of such issuance:

The interest rate, interest payment dates, optional redemption prices and maturity of each series of New Notes to be issued by the Issuer in the Exchange Offers will be the same as those of the corresponding series of Old Notes to be exchanged. The New Notes received in exchange for the tendered Old Notes will accrue interest from (and including) the most recent date to which interest has been paid on those Old Notes; provided, that interest will only accrue with respect to the aggregate principal amount of New Notes you receive, which will be less than the principal amount of Old Notes you tendered for exchange in the event that your Old Notes are tendered and accepted after the Early Participation Deadline. Except as otherwise set forth above, you will not receive a payment for accrued and unpaid interest on Old Notes you exchange at the time of the exchange.

Each series of New Notes is a new series of debt securities that will be issued under the New Indenture. The terms of the New Notes will include those expressly set forth in such notes, the New Indenture and those made part of the Indenture by reference to the Trust Indenture Act of 1939, as amended (the “Trust Indenture Act”).

From time to time before or after the Expiration Time, we or our affiliates may acquire any Old Notes that are not tendered and accepted in the Exchange Offers or any New Notes issued in the Exchange Offers through privately negotiated transactions, tender offers, exchange offers, redemption or otherwise, upon such terms and at such prices as we may determine (or as may be provided for in the Indenture governing the Old Notes and the New Notes), which with respect to the Old Notes may be more or less than the consideration to be received by participating holders in the Exchange Offers and, in either case, could be for cash or other consideration. There can be no assurance as to which, if any, of these alternatives or combinations thereof we or our affiliates may choose to pursue in the future.

Maximum Amount; Acceptance Priority Levels

We may increase or decrease the Maximum Amount in our sole discretion. Please see “—Extensions; Amendments; Waiver; Termination” below for more information.

Acceptance Priority Levels

The aggregate principal amount of Old Notes that are accepted for exchange in the Exchange Offers will be based on the order of acceptance priority for such series set forth in the table below (such order, the “Acceptance Priority Levels”), with Acceptance Priority Level 1 being the highest and Acceptance Priority Level 23 being the lowest, subject to the Minimum Size Condition and the Maximum Amount Condition (described below under “—Conditions to the Exchange Offers”).

If either of the Minimum Size Condition or the Maximum Amount Condition is not satisfied with respect to a given series of Old Notes, then (i) no Old Notes of that series will be accepted for exchange (whether or not validly tendered) and (ii) the series of Old Notes (if any) with the next lowest Acceptance Priority Level that satisfies both the Minimum Size Condition and the Maximum Amount Condition will be accepted for exchange, until there is no series of Old Notes with a lower Acceptance Priority Level to consider for exchange. Satisfaction of the Maximum Amount Condition will be tested at the Expiration Time for each series in order of Acceptance Priority Level.

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It is possible that any series of Old Notes with Acceptance Priority Level 10 or lower will fail to meet the Maximum Amount Condition and therefore will not be accepted for exchange. For example, if all holders of Old Notes in Acceptance Priority Levels 1 through 23 validly tender and do not validly withdraw such Old Notes, each series of Old Notes would be treated as set forth in the following table:

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As of the date of this prospectus, the aggregate principal amounts of the Old Notes outstanding are as set forth in the table above.

Early Participation Deadline; Expiration Time

The “Early Participation Deadline” is 5:00 p.m., New York City time, on November 28, 2018, unless extended, in which case the Early Participation Deadline will be such time and date to which the Early Participation Deadline is extended. The “Expiration Time” is 11:59 p.m., New York City time, on December 12, 2018, unless extended, in which case the Expiration Time will be such time and date to which the Expiration Time is extended.

We may extend the Early Participation Deadline and the Expiration Time for any reason, subject to applicable law, as further described in “—Extensions; Amendments; Waiver; Termination” below.

Settlement Date

If, as of the Expiration Time, all conditions have been or are concurrently satisfied (including that the registration statement of which this prospectus forms a part has been declared effective) or, where permitted, waived by us, the Issuer will issue New Notes in book-entry form and pay the cash consideration in connection with the Exchange Offers promptly on the “Settlement Date” (which is expected to be the second business day immediately following the Expiration Time), in exchange for all Old Notes validly tendered and accepted in accordance with the Acceptance Priority Levels, the Minimum Size Condition and the Maximum Amount Condition prior to the Expiration Time, other than any Old Notes validly withdrawn prior to the Expiration Time.

We will be deemed to have accepted validly tendered Old Notes, subject to the Acceptance Priority Levels and the conditions described herein, including the applicable Minimum Size Condition and the Maximum Amount Condition, if and when we have given oral or written notice thereof to the Exchange Agent. Subject to the terms and conditions of the Exchange Offers, delivery of New Notes and payment of the cash consideration in connection with the exchange of Old Notes accepted by us will be made by the Exchange Agent on the Settlement Date upon receipt of such notice. The Exchange Agent will act as agent for participating holders of the Old Notes for the purpose of Old Notes from, and transmitting New Notes and the cash consideration to, such holders. If any tendered Old Notes are not accepted for any reason set forth in the terms and conditions of the Exchange Offers or if Old Notes are validly withdrawn prior to the Expiration Time of the Exchange Offers, such unaccepted or withdrawn Old Notes will be returned without expense to the tendering holder promptly after the expiration or termination of the Exchange Offers.

Conditions to the Exchange Offers

Notwithstanding any other provision of this prospectus, the consummation of each Exchange Offer is subject to, and conditional upon, the satisfaction or, where permitted, waiver of the following conditions:

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If either of the Minimum Size Condition or the Maximum Amount Condition is not satisfied with respect to a given series of Old Notes, then (i) no Old Notes of that series will be accepted for exchange (whether or not validly tendered) and (ii) the series of Old Notes (if any) with the next lowest Acceptance Priority Level that satisfies both the Minimum Size Condition and the Maximum Amount Condition will be accepted for exchange, until there is no series of Old Notes with a lower Acceptance Priority Level to consider for exchange. Satisfaction of the Maximum Amount Condition will be tested at the Expiration Time for each series in order of Acceptance Priority Level.

In addition, notwithstanding any other provision of this prospectus, the consummation of each Exchange Offer is subject to, and conditional upon, the satisfaction or, where permitted, waiver of the following conditions:

and no statute, rule, regulation, order or injunction shall be sought, proposed, introduced, enacted, promulgated or deemed applicable to such Exchange Offer by any government or governmental authority, domestic or foreign, and no action shall have been taken, proposed or threatened, by any government, governmental authority, agency or court, domestic or foreign, that in our reasonable judgment might, directly or indirectly, result in any of the consequences referred to in clauses (1) or (2) above;

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or, in the case of any of the foregoing existing at the time of the commencement of such Exchange Offer, a material acceleration or worsening thereof; and

All conditions to the Exchange Offers, including those enumerated in paragraph (c) above, must be satisfied or, where permitted, waived (as described below under “—Extensions; Amendments; Waiver; Termination”), at or by the Expiration Time.

Extensions; Amendments; Waiver; Termination

We may extend the Early Participation Deadline and the Expiration Time for any reason, subject to applicable law. We will extend the Exchange Offers as required by applicable law, subject to our right to terminate one, some or all of the Exchange Offers under applicable law. To extend the Early Participation Deadline or the Expiration Time, we will notify the Exchange Agent and will make a public announcement thereof before 9:00 a.m., New York City time, on the next business day after the previously scheduled Early Participation Deadline or Expiration Time, as applicable. Such announcement will state that we are extending the Early Participation Deadline or the Expiration Time, as the case may be, for a specified period or on a daily basis. During any such extension, all Old Notes previously tendered in an extended Exchange Offer will remain subject to such Exchange Offer and may be accepted for exchange by us.

The conditions described above under “—Conditions to the Exchange Offers” are for our sole benefit and, subject to applicable law, may be waived by us, in whole or in part in our sole discretion, except that we may not waive the condition that the registration statement of which this prospectus forms a part has been declared effective by the SEC. Any determination made by us concerning these events, developments or circumstances shall be conclusive and binding, subject to the rights of the holders of the Old Notes to challenge such determination in a court of competent jurisdiction.

If any of the conditions described above under “—Conditions to the Exchange Offers” is not satisfied at or prior to the Expiration Time, we may, at any time before the consummation of the Exchange Offers:

Subject to applicable law, we expressly reserve the right, in our sole discretion, with respect to the Exchange Offers for each series of Old Notes to:

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Subject to the qualifications described above, if we exercise any such right, we will give written notice thereof to the Exchange Agent and will make a public announcement thereof as promptly as practicable. Without limiting the manner in which we may choose to make a public announcement of any delay, extension, amendment or termination of any of the Exchange Offers, or waiver of any condition to any of the Exchange Offers, we will not be obligated to publish, advertise or otherwise communicate any such public announcement, other than by making a timely press release to any appropriate news agency.

The minimum period during which the Exchange Offers will remain open following material changes in the terms of the Exchange Offers or in the information concerning the Exchange Offers will depend upon the facts and circumstances of such change, including the relative materiality of the changes.

We expressly reserve the right to increase or decrease the Maximum Amount in respect of the Exchange Offers, as described in “—Terms of the Exchange Offers” above. In accordance with Rule 14e-1 under the Exchange Act, if we elect to change the consideration offered or the percentage of Old Notes sought, the relevant Exchange Offers will remain open for a minimum ten business-day period following the date that the notice of such change is first published or sent to holders of the Old Notes.

If the terms of the Exchange Offers are amended in a manner determined by us to constitute a material change adversely affecting any holder of the Old Notes, we will promptly disclose any such amendment in a manner reasonably calculated to inform holders of the Old Notes of such amendment, and will extend the relevant Exchange Offers, or if the Expiration Time has passed, provide additional withdrawal rights, for a time period that we deem appropriate, depending upon the significance of the amendment and the manner of disclosure to the holders of the Old Notes, if the Exchange Offers would otherwise expire during such time period.

Subject to applicable law, each Exchange Offer is being made independently of the other Exchange Offers, and we reserve the right to terminate, withdraw, amend or waive any condition to each Exchange Offer independently of the other Exchange Offers at any time and from time to time, as described in this prospectus.

Effect of Tender

Any tender of an Old Note by a noteholder that is not validly withdrawn will constitute a binding agreement between that holder and the Issuer, which agreement will be governed by, and construed in accordance with, the laws of the State of New York. The acceptance of the Exchange Offers by a tendering holder of Old Notes will constitute the agreement by a tendering holder to deliver good and marketable title to the tendered Old Notes, free and clear of all liens, charges, claims, encumbrances, interests and restrictions of any kind.

Absence of Dissenters’ Rights

Holders of Old Notes do not have any appraisal rights or dissenters’ rights under New York law or under the terms of the Old Notes in connection with the Exchange Offers.

Procedures for Tendering Old Notes

If you hold Old Notes and wish to have those notes exchanged for New Notes and the cash consideration, you must validly tender (or cause the valid tender of) your Old Notes using the procedures described in this prospectus.

The procedures by which you may tender or cause to be tendered Old Notes will depend upon the manner in which you hold the Old Notes, as described below.

Old Notes Held with DTC by a DTC Participant

Pursuant to authority granted by DTC, if you are a DTC participant that has Old Notes credited to your DTC account and thereby held of record by DTC’s nominee, you may directly tender your Old Notes as if you were the record holder. Accordingly, references herein to record holders include DTC participants with Old Notes credited to their accounts. Within two business days after the date of this prospectus, the Exchange Agent will establish accounts with respect to the Old Notes at DTC for purposes of the Exchange Offers.

Old Notes may be tendered and accepted for payment only in principal amounts equal to the minimum authorized denomination for the respective series of Old Notes and any integral multiple of $1,000 in excess thereof. No alternative, conditional or contingent tenders will be accepted. Holders who tender less than all of their Old

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Notes must continue to hold Old Notes in at least the minimum denomination of $1,000 and integral multiples of $1,000 in excess thereof.

Any DTC participant may tender Old Notes by effecting a book-entry transfer of the Old Notes to be tendered in the Exchange Offers into the account of the Exchange Agent at DTC and electronically transmitting its acceptance of the Exchange Offers through DTC’s ATOP procedures for transfer before the Expiration Time of the Exchange Offers. There will be no letter of transmittal for this offer.

If ATOP procedures are followed, DTC will verify each acceptance transmitted to it, execute a book-entry delivery to the Exchange Agent’s account at DTC and send an agent’s message to the Exchange Agent. An “agent’s message” is a message, transmitted by DTC to and received by the Exchange Agent and forming part of a book-entry confirmation, which states that DTC has received an express acknowledgement from a DTC participant tendering Old Notes that the participant has received and agrees to be bound by the terms of the Exchange Offers (as set forth in this prospectus) and that BP may enforce the agreement against the participant. DTC participants following this procedure should allow sufficient time for completion of the ATOP procedures prior to the Expiration Time of the Exchange Offers.

The agent’s message and any other required documents must be transmitted to and received by the Exchange Agent prior to the Expiration Time at the address set forth on the back cover of this prospectus. Delivery of these documents to DTC does not constitute delivery to the Exchange Agent.

Old Notes Held Through a Nominee by a Beneficial Owner

Currently, all of the Old Notes are held in book-entry form and can only be tendered by following the procedures described under “—Procedures for Tendering Old Notes—Old Notes Held with DTC by a DTC Participant”. However, any beneficial owner whose Old Notes are registered in the name of a broker, dealer, commercial bank, trust company or other nominee and who wishes to tender should contact the registered holder promptly and instruct it to tender on the owner’s behalf if it wishes to participate in the Exchange Offers. You should keep in mind that your intermediary may require you to take action with respect to the Exchange Offers a number of days before the Early Participation Deadline or the Expiration Time in order for such entity to tender Old Notes on your behalf on or prior to the Early Participation Deadline or the Expiration Time in accordance with the terms of the Exchange Offers.

Beneficial owners should be aware that their broker, dealer, commercial bank, trust company or other nominee may establish its own earlier deadlines for participation in the Exchange Offers. Accordingly, beneficial owners wishing to participate in the Exchange Offers should contact their broker, dealer, commercial bank, trust company or other nominee as soon as possible in order to determine the times by which such owner must take action in order to participate in the Exchange Offers.

No Guaranteed Delivery

There are no guaranteed delivery provisions provided for in conjunction with the Exchange Offers under the terms of this prospectus. Tendering holders must tender their Old Notes in accordance with the procedures set forth above.

Withdrawal of Tenders

Tenders of Old Notes in connection with any Exchange Offer may be withdrawn at any time prior to the Expiration Time of the particular Exchange Offer. Tenders of Old Notes may not be withdrawn at any time thereafter.

Beneficial owners desiring to withdraw Old Notes previously tendered through the ATOP procedures should contact the DTC participant through which they hold their Old Notes. In order to withdraw Old Notes previously tendered, a DTC participant may, prior to the Expiration Time, withdraw its instruction previously transmitted through ATOP by (1) withdrawing its acceptance through ATOP, or (2) delivering to the Exchange Agent by mail, hand delivery or facsimile transmission, notice of withdrawal of such instruction. The notice of withdrawal must contain the name and number of the DTC participant, the series of Old Notes subject to the notice and the principal amount of each series of Old Notes subject to the notice. Withdrawal of a prior instruction will be effective upon receipt of such notice of withdrawal by the Exchange Agent. All signatures on a notice of withdrawal must be guaranteed by a recognized participant in the Securities Transfer Agents Medallion Program, the NYSE Medallion Signature Program or the Stock Exchange Medallion Program, except that signatures on the notice of withdrawal

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need not be guaranteed if the Old Notes being withdrawn are held for the account of an eligible institution. A withdrawal of an instruction must be executed by a DTC participant in the same manner as such DTC participant’s name appears on its transmission through ATOP to which the withdrawal relates. A DTC participant may withdraw a tender only if the withdrawal complies with the provisions described in this section.

For a withdrawal to be effective for Euroclear or Clearstream Luxembourg participants, holders must comply with their respective standard operating procedures for electronic tenders and the Exchange Agent must receive an electronic notice of withdrawal from Euroclear or Clearstream Luxembourg. Any notice of withdrawal must specify the name and number of the account at Euroclear or Clearstream Luxembourg and otherwise comply with the procedures of Euroclear or Clearstream Luxembourg as applicable.

Withdrawals of tenders of Old Notes may not be rescinded and any Old Notes withdrawn will thereafter be deemed not validly tendered for purposes of the Exchange Offers. Properly withdrawn Old Notes, however, may be re-tendered by following the procedures described above at any time prior to the Expiration Time.

Miscellaneous

All questions as to the validity, form, eligibility (including time of receipt) and acceptance for exchange of any tender of Old Notes in the Exchange Offers will be determined by us, in our sole discretion, and our determination will be final and binding. We reserve the absolute right to reject any or all tenders not in proper form or the acceptance for exchange of which may, in the opinion of our counsel, be unlawful. We also reserve the absolute right to waive any defect or irregularity in the tender of any Old Notes in the Exchange Offers, and our interpretation of the terms and conditions of the Exchange Offer will be final and binding on all parties. None of the BP Group (including the Issuer), the Exchange Agent, the Information Agent, the Dealer Managers or the Trustee, or any other person, will be under any duty to give notification of any defects or irregularities in tenders or incur any liability for failure to give any such notification.

Tenders of Old Notes involving any irregularities will not be deemed to have been made until such irregularities have been cured or waived. Old Notes received by the Exchange Agent in connection with any Exchange Offer that are not validly tendered and as to which the irregularities have not been cured or waived will be returned by the Exchange Agent to the participant who delivered such Old Notes by crediting an account maintained at either DTC, Euroclear or Clearstream, as applicable, designated by such participant, in either case promptly after the Expiration Time of the applicable Exchange Offer or the withdrawal or termination of the applicable Exchange Offer.

We may also in the future seek to acquire untendered Old Notes in open market or privately negotiated transactions, through subsequent Exchange Offers or otherwise. The terms of any of those purchases or offers could differ from the terms of these Exchange Offers.

Transfer Taxes

We will pay all transfer taxes, if any, applicable to the transfer and sale of Old Notes to us in the Exchange Offers. If transfer taxes are imposed for any other reason, the amount of those transfer taxes, whether imposed on the registered holders or any other persons, will be payable by the tendering holder.

If the tendering holder does not provide us with satisfactory evidence of payment of or exemption from those transfer taxes, the amount of those transfer taxes will be billed directly to the tendering holder and/or withheld from any payments due with respect to the Old Notes tendered by such holder.

U.S. Federal Backup Withholding

Under current U.S. federal income tax law, the Exchange Agent (as payer) may be required under the backup withholding rules to withhold a portion of any payments made to certain holders (or other payees) of Old Notes pursuant to the Exchange Offers. To avoid such backup withholding, each tendering holder of Old Notes must timely provide the Exchange Agent with such holder’s correct taxpayer identification number (“TIN”) on IRS Form W-9 (available from the IRS website at http://www.irs.gov), or otherwise establish a basis for exemption from backup withholding (currently imposed at a rate of 24%). Certain holders (including, among others, all corporations and certain foreign persons) are exempt from these backup withholding requirements. Exempt holders should furnish their TIN, provide the applicable codes in the box labeled “Exemptions,” and sign, date and send the IRS Form W-9 to the Exchange Agent. Foreign persons, including entities, may qualify as exempt recipients by submitting to the Exchange Agent a properly completed IRS Form W-8BEN or IRS Form W-8BEN-E (or other

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applicable form), signed under penalties of perjury, attesting to that holder’s foreign status. Backup withholding will be applied to the otherwise exempt recipients that fail to provide the required documentation. The applicable IRS Form W-8BEN or IRS Form W-8BEN-E can be obtained from the IRS or from the Exchange Agent. If a holder is an individual who is a U.S. citizen or resident, the TIN is generally his or her social security number. If the Exchange Agent is not provided with the correct TIN, a $50 penalty may be imposed by the IRS and/or payments made with respect to Old Notes exchanged pursuant to the Exchange Offers may be subject to backup withholding. Failure to comply truthfully with the backup withholding requirements, if done willfully, may also result in the imposition of criminal and/or civil fines and penalties. See IRS Form W-9 for additional information.

If backup withholding applies, the Exchange Agent would be required to withhold on any payments made to the tendering holders (or other payee). Backup withholding is not an additional tax. A holder subject to the backup withholding rules will be allowed a credit of the amount withheld against such holder’s U.S. federal income tax liability, and, if backup withholding results in an overpayment of tax, the holder may be entitled to a refund, provided the requisite information is correctly furnished to the IRS in a timely manner.

BP reserves the right in its sole discretion to take all necessary or appropriate measures to comply with its respective obligations regarding backup withholding.

Exchange Agent

D.F. King & Co., Inc. has been appointed as the Exchange Agent for the Exchange Offers. All correspondence in connection with the Exchange Offers should be sent or delivered by each holder of Old Notes, or a beneficial owner’s custodian bank, depositary, broker, trust company or other nominee, to the Exchange Agent at the address and telephone number set forth on the back cover of this prospectus. We will pay the Exchange Agent’s reasonable and customary fees for their services and will reimburse them for their reasonable, out-of-pocket expenses in connection therewith.

Information Agent

D.F. King & Co., Inc. has also been appointed as the Information Agent for the Exchange Offers, and will receive customary compensation for its services. Questions concerning tender procedures and requests for additional copies of this prospectus should be directed to the Information Agent at the address and telephone number set forth on the back cover of this prospectus. Holders may also contact their commercial bank, broker, dealer, trust company or other nominee for assistance concerning the Exchange Offers.

Dealer Managers

We have retained Barclays Capital Inc., Merrill Lynch, Pierce, Fenner & Smith Incorporated and Goldman Sachs & Co. LLC to act as the Dealer Managers in connection with the Exchange Offers. We will pay the Dealer Managers a customary fee as compensation for their services. We will pay the fees and expenses relating to the Exchange Offers. The obligation of the Dealer Managers to perform their functions is subject to various conditions. We have agreed to indemnify the Dealer Managers, and the Dealer Managers have agreed to indemnify us, against various liabilities, including various liabilities under the federal securities laws. The Dealer Managers may contact holders of Old Notes by mail, telephone, facsimile transmission, or personal interviews, and otherwise may request broker-dealers and the other nominee holders to forward materials relating to the Exchange Offers to beneficial holders. Questions regarding the terms of the Exchange Offers may be directed to the Dealer Managers at the addresses and telephone numbers listed on the back cover of this prospectus. At any given time, the Dealer Managers may trade the Old Notes or other securities of the BP Group for their own accounts or for the accounts of their customers and, accordingly, may hold a long or short position in the Old Notes. The Dealer Managers and their respective affiliates have, from time to time, performed, and may in the future perform, various financial advisory and investment banking services for us, for which they received or will receive customary fees and expenses.

Other Fees and Expenses

The expenses of soliciting tenders with respect to the Old Notes will be borne by us. The principal solicitations are being made by mail; however, additional solicitations may be made by facsimile transmission, telephone or in person by the Dealer Managers, as well as by officers and other employees of the BP Group and its affiliates.

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Tendering holders of Old Notes will not be required to pay any fee or commission to the Dealer Managers. However, if a tendering holder handles the transaction through its broker, dealer, commercial bank, trust company or other institution, that holder may be required to pay brokerage fees or commissions.

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DESCRIPTION OF THE DIFFERENCES BETWEEN THE NEW NOTES AND THE OLD NOTES

The following is a summary comparison of certain terms of the New Notes and the Old Notes that differ. The terms of the New Notes to be issued in the Exchange Offers are identical in all material respects to the Old Notes, with minor exceptions. The New Notes will have the same financial terms and covenants as the Old Notes, and are subject to the same business and financial risks. The Old Notes are, and each series of the New Notes will be, fully and unconditionally guaranteed by BP. The Old Notes were issued pursuant to supplemental indentures to an indenture, dated March 8, 2002, among BP Capital U.K., the Guarantor and The Bank of New York Mellon Trust Company, N.A. (as successor to JPMorgan Chase Bank, N.A.), as trustee (the “Trustee”) (such indenture, as supplemented, the “Old Indenture”). The New Notes will be issued pursuant to a supplemental indenture to an indenture, dated June 4, 2003, among the Issuer, the Guarantor and the Trustee (such indenture, as will be supplemented, the “New Indenture” and together with the Old Indenture, the “Indentures”).

This summary does not purport to be complete and is qualified in its entirety by reference to the Indentures. Copies of the Indentures, including the relevant supplements thereto, are filed as exhibits to the registration statement of which this prospectus forms a part and are also available from the Information Agent upon request.

Other terms used in the comparison of the New Notes and the Old Notes below and not otherwise defined in this prospectus have the meanings given to those terms in the Indentures, as applicable. Article and section references in the descriptions of the notes below are references to the applicable Indentures under which the notes were or will be issued.

Additional Amounts

Pursuant to Section 1010 of the Old Indenture, holders of the Old Notes are entitled to payment of additional amounts by BP Capital U.K. and the Guarantor in certain situations as a result of changes in U.K. tax withholding or deduction requirements. Pursuant to Section 1010 of the New Indenture, holders of the New Notes will only be entitled to payment of additional amounts by the Guarantor, as described under “Description of the New Notes and Guarantees—Additional Amounts.” The Issuer is under no obligation to pay additional amounts to holders of the New Notes.

Optional Tax Redemption

Pursuant to Section 1108 of the Old Indenture, BP has the option to redeem Old Notes if, as a result of changes in U.K. tax withholding or deduction requirements, BP Capital U.K. or the Guarantor would be required to pay additional amounts. Pursuant to Section 1108 of the New Indenture, BP will have the option to redeem New Notes only if, as a result of changes in U.K. tax withholding or deduction requirements, the Guarantor would be required to pay additional amounts, as described under “Description of the New Notes and Guarantees—Optional Tax Redemption of the New Notes.” As the Issuer of the New Notes is under no obligation to pay additional amounts, this provision will not apply to the Issuer of the New Notes.

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DESCRIPTION OF THE NEW NOTES AND GUARANTEES

For purposes of this section “Description of the New Notes and Guarantees,” the terms “we,” “us,” and “our” shall refer to BP and BP Capital America, and not any of our other subsidiaries. “Holders” shall refer to holders of the New Notes. The terms of the New Notes will include those stated in the New Indenture and those made part of the New Indenture by reference to the Trust Indenture Act of 1939. The following is a summary of the material provisions of the New Indenture and the New Notes. Because this is a summary, it may not contain all the information that is important to you. You should read the New Indenture in its entirety. See “Where You Can Find More Information.” All capitalized terms used but not defined herein are as defined in the Indentures, as applicable.

General

The New Notes will be issued by BP Capital America Inc. (the “Issuer”) and will be fully and unconditionally guaranteed by BP p.l.c. (the “Guarantor”). Other than the identity of the Issuer, the terms of each series of the New Notes will be identical in all material respects to the corresponding series of Old Notes, with minor exceptions as discussed in “Description of Differences Between the New Notes and the Old Notes.” Application will be made to list each series of New Notes on the New York Stock Exchange. There can be no assurance that any series of New Notes will be listed.

Each series of the New Notes will be issued under a supplemental indenture to the indenture, dated June 4, 2003, among the Issuer, the Guarantor and The Bank of New York Mellon Trust Company, N.A. (as successor to JPMorgan Chase Bank, N.A.), as trustee, principal paying agent, transfer agent and registrar (the “Trustee”) (such indenture, as will be supplemented, the “New Indenture”). This information, however, does not purport to be complete and is subject to, and is qualified in its entirety by reference to, all the provisions of the New Notes and the New Indenture, including the definitions of certain terms contained therein. We include references in parentheses to some sections of the New Indenture. Whenever we refer to particular sections or defined terms of the New Indenture in this prospectus, those sections or defined terms are incorporated by reference herein. The New Indenture is by its terms subject to and governed by the Trust Indenture Act of 1939, as amended.

The New Notes will be senior unsecured obligations of the Issuer and will rank equally with all other existing and future unsecured and unsubordinated debt obligations of the Issuer. The New Notes will be repaid at maturity in U.S. dollars at a price equal to 100% of the principal amount thereof. The New Notes will be issued in denominations of $1,000 and integral multiples of $1,000 in excess thereof. The New Notes do not provide for any sinking fund. The New Notes will be recorded on, and transferred through, the records maintained by DTC and its direct and indirect participants, including Euroclear S.A./N.V. (“Euroclear”) and Clearstream Banking, société anonyme (“Clearstream”).

For purposes of the New Notes, “Business Day” means any week day on which banking or trust institutions in neither New York nor London are authorized generally or obligated by law, regulation or executive order to close.

The New Notes offered by this registration statement will have the respective maturity dates, interest rates and interest payment dates as specified in the table below.

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Interest on the New Fixed Rate Notes

Interest on the New Fixed Rate Notes will accrue from the applicable date set forth in column D of the table above and will payable semi-annually on the applicable interest payment dates set forth in column E of the table above (the “Interest Payment Dates”), commencing on the applicable date set forth in column F of the table above until the principal of such New Fixed Rate Notes is paid or made available for payment. Interest on the New Fixed Rate Notes will be calculated on the basis of a 360-day year consisting of twelve 30-day months. Interest on the New Fixed Rate Notes will be paid to the persons in whose names the New Fixed Rate Notes are registered at the close of business on the applicable Record Date, as defined below. If any payment is due on any New Fixed Rate Note on a day that is not a Business Day, it will be made on the next following Business Day, provided that no interest will accrue on the payment so deferred.

A “Business Day” for these purposes is any week day on which banking or trust institutions in neither New York nor London are authorized generally or obligated by law, regulation or executive order to close.

The “Record Dates” for the New Fixed Rate Notes, with the exception of the 4.50% Guaranteed Notes due 2020, will be the 15^th calendar day immediately preceding the applicable interest payment date, whether or not such day is

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a Business Day. The Record Dates for the 4.50% Guaranteed Notes due 2020 will be March 17 and September 16 in each year, whether or not such date is a Business Day.

Interest on the New Floating Rate Notes

Interest on the New Floating Rate Notes will be payable quarterly on the applicable Interest Payment Dates set forth in column E of the table above, commencing on the applicable date set forth in column F of the table above, subject to the Day Count Convention (as defined below), and until the principal of such New Floating Rate Notes is paid or duly made available for payment. Interest on the New Floating Rate Notes will be paid to the persons in whose names the New Floating Rate Notes are registered at the close of business on the 15^th calendar day immediately preceding the applicable Interest Payment Date, whether or not such day is a Business Day.

The interest rate for any Interest Period (as defined below) will be the 3-month U.S. dollar LIBOR, as determined on the applicable Interest Determination Date (as defined below), plus 0.870%, in the case of the Floating Rate Guaranteed Notes due 2021 and plus 0.650% in the case of the Floating Rate Guaranteed Notes due 2022. The interest rate on the New Floating Rate Notes will be reset quarterly on each Interest Reset Date (as defined below). For each Interest Period, interest on the New Floating Rate Notes will be calculated on the basis of the actual number of days in the Interest Period divided by 360.

The Calculation Agent will determine U.S. dollar LIBOR in accordance with the following provisions: With respect to any Interest Determination Date, U.S. dollar LIBOR will be the rate for deposits in U.S. dollars having a maturity of three months commencing on the applicable Interest Reset Date that appears on the designated LIBOR page as of 11:00 a.m., London time, on that Interest Determination Date. If no rate appears, U.S. dollar LIBOR, in respect of that Interest Determination Date, will be determined as follows: the Calculation Agent will request the principal London offices of each of four major reference banks in the London interbank market, as selected and identified by BP Capital America, to provide the Calculation Agent with its offered quotation for deposits in U.S. dollars for the period of three months, commencing on the applicable Interest Reset Date, to prime banks in the London interbank market at approximately 11:00 a.m., London time, on that Interest Determination Date and in a principal amount that is representative for a single transaction in U.S. dollars in that market at that time. If at least two quotations are provided, then U.S. dollar LIBOR on that Interest Determination Date will be the arithmetic mean of those quotations. If fewer than two quotations are provided, then U.S. dollar LIBOR on the applicable Interest Determination Date will be the arithmetic mean of the rates quoted at approximately 11:00 a.m., New York City time, on the applicable Interest Determination Date by three major banks in The City of New York selected and identified by BP Capital America for loans in U.S. dollars to leading European banks, having a three-month maturity and in a principal amount that is representative for a single transaction in U.S. dollars in that market at that time; provided, however, that if the banks selected and identified by BP Capital America are not providing quotations in the manner described by this sentence, U.S. dollar LIBOR determined as of the applicable Interest Determination Date will be U.S. dollar LIBOR in effect on that Interest Determination Date (i.e., the same as the rate determined for the immediately preceding Interest Reset Date).

The designated LIBOR page for the Floating Rate Guaranteed Notes due 2021 is Reuters screen “LIBOR01”, or any successor service for the purpose of displaying the London interbank rates of major banks for U.S. dollars. The Reuters screen “LIBOR01” is the display designated as the Reuters screen “LIBOR01”, or such other page as may replace the Reuters screen “LIBOR01” on that service or such other service or services as may be nominated for the purpose of displaying London interbank offered rates for U.S. dollar deposits by ICE Benchmark Administration Limited (“IBA”) or its successor or such other entity assuming the responsibility of IBA or its successor in calculating the London Interbank Offered Rate in the event IBA or its successor no longer does so.

The designated LIBOR page for the Floating Rate Guaranteed Notes due 2022 is Bloomberg L.P.’s page “BBAM”, or any successor service for the purpose of displaying the London interbank rates of major banks for U.S. dollars. Bloomberg L.P.’s page “BBAM” is the display designated as “BBAM”, or such other page as may replace Bloomberg L.P.’s page “BBAM” on that service or such other service or services as may be nominated for the purpose of displaying London interbank offered rates for U.S. dollar deposits IBA or its successor or such other entity assuming the responsibility of IBA or its successor in calculating the London Interbank Offered Rate in the event IBA or its successor no longer does so.

All calculations made by the Calculation Agent for the purposes of calculating the interest rates on New Floating Rate Notes shall be conclusive and binding on the holders of the New Floating Rate Notes, BP, BP Capital America and the Trustee, absent manifest error.

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“Calculation Agent” means The Bank of New York Mellon Trust Company, N.A.

“Day Count Convention” means that if any Interest Payment Date (other than the applicable maturity date set forth in column C of the table above (the “Maturity Date”) or a date fixed for redemption) falls on a day that is not a Business Day, that Interest Payment Date will be postponed to the next succeeding Business Day unless that Business Day is in the next succeeding calendar month, in which case the Interest Payment Date will be the immediately preceding Business Day. If the applicable Maturity Date or a date fixed for redemption shall not be a Business Day, payment of the principal of and interest due on that date need not be made on that day but may be made on the next day that is a Business Day with the same force and effect as if made on the applicable Maturity Date or such date fixed for redemption, provided that no interest shall accrue for the period from and after the applicable Maturity Date or such date fixed for redemption.

“Interest Determination Date” means, for each particular Interest Reset Date (as defined below), the second London business day (as defined below) preceding such Interest Reset Date.

“Interest Period” means the period beginning on, and including, an Interest Payment Date and ending on, but not including, the following Interest Payment Date; provided that the first Interest Period began on the applicable date set forth in column D of the table above and will end on, but not include, the applicable date set forth in column F of the table above.

“Interest Reset Date” means, for each Interest Period other than the first Interest Period, the first day of such Interest Period, subject to the Day Count Convention.

“London Business Day” means any weekday on which banking or trust institutions in London are not authorized generally or obligated by law, regulation or executive order to close, on which dealings in deposits in U.S. dollars are transacted in the London interbank market.

Additional Notes

The New Notes will be issued in the initial aggregate principal amount set forth above. The Issuer may, from time to time, without notice to or the consent of the Holders, create and issue, pursuant to the New Indenture and in accordance with applicable laws and regulations, additional New Notes (the “Additional Notes”) maturing on the same maturity date as the other New Notes of a series and having the same terms and conditions under the New Indenture (including with respect to the Guarantor and the Guarantees) as the previously outstanding New Notes of that series in all respects (or in all respects except for issuance date, issue price and, possibly, the first interest payment date and the date interest starts accruing) so that such Additional Notes shall be consolidated and form a single series with the previously outstanding New Notes of that series, provided that either will be issued with no more than de minimis original issue discount or will be part of a “qualified reopening” for U.S. federal income tax purposes. Without limiting the foregoing, the Issuer may, from time to time, without notice to or the consent of the Holders, create and issue, pursuant to the New Indenture and in accordance with applicable laws and regulations, additional series of notes with additional or different terms and maturity dates than the New Notes.

Optional Redemption of the New Notes

BP Capital America has the right to redeem the New Fixed Rate Notes listed in the immediately following table in whole or in part, at any time and from time to time, at a redemption price equal to the greater of (x) 100% of the principal amount of the New Notes to be redeemed and (y) the sum of the present values of the remaining scheduled payments of principal and interest on the New Notes to be redeemed (in each case not including any portion of payments of interest accrued and unpaid to the redemption date) in each case discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the treasury rate plus the applicable Make-Whole Spread (as set forth in the table below) for such series of New Notes, plus in each case accrued and unpaid interest to the date of redemption.

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BP Capital America has the right to the New Fixed Rate Notes listed in the immediately following table in whole or in part, at any time and from time to time prior to the applicable par call date (as set forth in the table below, the “Par Call Date”), at a redemption price equal to the greater of (x) 100% of the principal amount of the New Notes to be redeemed and (y) the sum of the present values of the remaining scheduled payments of principal and interest on the New Notes to be redeemed, calculated as if the New Notes to be redeemed matured on the applicable Par Call Date, (in each case not including any portion of payments of interest accrued and unpaid to the redemption date) in each case discounted to the redemption date on a semi-annual basis (assuming a 360-day year consisting of twelve 30-day months) at the treasury rate plus the applicable Make-Whole Spread (as set forth in the table below) for such series of New Notes, plus in each case accrued and unpaid interest to the date of redemption.

On or after the applicable Par Call Date, BP Capital America has the right to redeem the New Fixed Rate Notes listed in the table above, in whole or in part, at any time and from time to time at a redemption price equal to 100% of the principal amount of the New Notes to be redeemed, plus accrued and unpaid interest, if any, thereon to, but excluding, the date of redemption

For purposes of determining the optional redemption price for any series of New Fixed Rate Notes, the following definitions are applicable:

“Treasury rate” means, with respect to any redemption date, the rate per annum equal to the semi-annual equivalent yield to maturity or interpolated (on a day count basis) of the comparable treasury issue, assuming a price

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for the comparable treasury issue (expressed as a percentage of its principal amount) equal to the comparable treasury price for such redemption date.

“Comparable treasury issue” means the U.S. Treasury security or securities selected by the quotation agent as having an actual or interpolated maturity comparable to the remaining term of the New Fixed Rate Notes to be redeemed that would be utilized, at the time of selection and in accordance with customary financial practice, in pricing new issues of corporate debt securities of comparable maturity to the remaining term of such notes.

“Comparable treasury price” means, with respect to any redemption date, the average of the reference treasury dealer quotations for such redemption date.

“Quotation agent” means one of the reference treasury dealers appointed by BP Capital America.

“Reference treasury dealer” means Barclays Capital Inc., Goldman Sachs & Co. LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated or their affiliates, each of which is a primary U.S. government securities dealer in the United States (a “primary treasury dealer”), and their respective successors, and two other primary treasury dealers selected by BP Capital America, provided, however, that if any of the foregoing shall cease to be a primary treasury dealer, BP Capital America shall substitute therefor another primary treasury dealer.

“Reference treasury dealer quotations” means with respect to each reference treasury dealer and any redemption date, the average, as determined by the quotation agent, of the bid and asked prices for the comparable treasury issue (expressed in each case as a percentage of its principal amount) quoted in writing to the quotation agent by such reference treasury dealer at 5:00 p.m. New York time on the third business day preceding such redemption date.

The New Floating Rate Notes may not be redeemed, except as described in “Description of the New Notes and Guarantees—Optional Tax Redemption of the New Notes.”

Optional Tax Redemption of the New Notes

We may redeem the New Notes of a given series if, as a result of any change in United Kingdom tax treatment, BP would be required to pay additional amounts as described below under “—Additional Amounts”. This option applies only in the case of changes in United Kingdom tax treatment that occur on or after the date of this Prospectus. The redemption price for the New Notes will be equal to the principal amount of the New Notes being redeemed plus accrued interest. (Section 1108)

Event Risk Provisions

The New Notes do not contain event risk provisions designed to require BP or BP Capital America to redeem or repurchase the New Notes, reset the interest rate or take other actions in response to highly leveraged transactions, changes in credit ratings or similar occurrences.

Exchange and Transfer

You may have your New Notes broken into more New Notes of smaller denominations or combined into fewer New Notes of larger denominations, as long as the total principal amount is not changed. (Section 305) This is called an exchange.

You may exchange or transfer registered New Notes at the office of the Trustee. The Trustee acts as our agent for registering New Notes in the names of holders and transferring registered New Notes. We may change this appointment to another entity or perform the service ourselves. The entity performing the role of maintaining the list of registered holders is called the security registrar. It will also register transfers of the registered New Notes. (Section 305)

You will not be required to pay a service charge to transfer or exchange New Notes, but you may be required to pay for any tax or other governmental charge associated with the exchange or transfer. The transfer or exchange of a registered New Note will only be made if the security registrar is satisfied with your proof of ownership.

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We may cancel the designation of any particular transfer agent. We may also approve a change in the office through which any transfer agent acts. (Section 1002)

If we redeem less than all of the New Notes of a particular series, we may block the transfer or exchange of New Notes during a specified period of time in order to freeze the list of holders to prepare the mailing. The period begins 15 days before the day we mail the notice of redemption and ends on the day of that mailing. We may also refuse to register transfers or exchanges of New Notes selected for redemption. However, we will continue to permit transfers and exchanges of the unredeemed portion of any security being partially redeemed. (Section 305)

Payment and Paying Agents

We will pay interest to you if you are a direct holder listed in the Trustee’s records at the close of business on the applicable record date set forth under “—General” above, even if you no longer own the New Notes on the interest payment date. (Section 307)

We will pay interest, principal and any other money due on the registered New Notes at the corporate trust office of the Trustee in Chicago, Illinois. That office is currently located at The Bank of New York Mellon Trust Company, N.A., 2 North LaSalle Street, Suite 700, Chicago, Illinois 60602. You must make arrangements to have your payments picked up at or wired from that office. We may also choose to pay interest by mailing checks. Interest on global notes will be paid to the holder thereof by wire transfer of same-day funds.

Holders buying and selling New Notes must work out between them how to compensate for the fact that we will pay all the interest for an interest period to the one who is the registered holder on the record date. The most common manner is to adjust the sales price of the New Notes to prorate interest fairly between buyer and seller. This prorated interest amount is called accrued interest.

We may also arrange for additional payment offices, and may cancel or change these offices, including our use of the Trustee’s corporate trust office. These offices are called paying agents. We may also choose to act as our own paying agent. We must notify you through the Trustee of changes in the paying agents for the New Notes. (Section 1002)

Book-Entry Form

The New Notes will initially be issued to investors in book-entry form only. Fully registered global notes representing the total aggregate principal amount of the New Notes of each series will be issued and registered in the name of a nominee for DTC, the securities depositary for the New Notes, for credit to accounts of direct or indirect participants in DTC, Euroclear and Clearstream. Unless and until New Notes in definitive certificated form are issued, the only holder will be Cede & Co., as nominee of DTC, or the nominee of a successor depositary. Except as described in this prospectus, a beneficial owner of any interest in a global note will not be entitled to receive physical delivery of definitive New Notes. Accordingly, each beneficial owner of any interest in a global note must rely on the procedures of DTC, Euroclear, Clearstream, or their participants, as applicable, to exercise any rights under the New Notes.

Global Clearance and Settlement Procedures

Secondary market trading between DTC participants will occur in the ordinary way in accordance with DTC rules. Secondary market trading between Clearstream Luxembourg participants and/or Euroclear participants will occur in the ordinary way in accordance with the applicable rules and operating procedures of Clearstream Luxembourg and Euroclear and will be settled using the procedures applicable to conventional eurobonds.

Cross-market transfers between persons holding directly or indirectly through DTC participants, on the one hand, and directly or indirectly through Clearstream Luxembourg or Euroclear participants, on the other hand, will be effected in DTC in accordance with DTC rules on behalf of the relevant international clearing system by its U.S. depositary. However, cross-market transactions will require delivery of instructions to the relevant international clearing system by the counterparty in that system in accordance with its rules and procedures and within its established deadlines (European time). The relevant international clearing system will, if a transaction meets its

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settlement requirements, deliver instructions to its U.S. depositary to take action to effect final settlement on its behalf by delivering or receiving securities in DTC. Clearstream Luxembourg participants and Euroclear participants may not deliver instructions directly to the respective U.S. depositary.

Because of time-zone differences, credits of notes received in Clearstream Luxembourg or Euroclear as a result of a transaction with a DTC participant will be made during subsequent securities settlement processing and dated the business day following the DTC settlement date. These credits or any transactions in the New Notes settled during the processing will be reported to the relevant Clearstream Luxembourg or Euroclear participants on that business day. Cash received in Clearstream Luxembourg or Euroclear as a result of sales of New Notes by or through a Clearstream Luxembourg participant or a Euroclear participant to a DTC participant will be received with value on the DTC settlement date but will be available in the relevant Clearstream Luxembourg or Euroclear cash account only as of the business day following settlement in DTC.

Although it is expected that DTC, Clearstream Luxembourg and Euroclear will follow the foregoing procedures in order to facilitate transfers of New Notes among participants of DTC, Clearstream Luxembourg and Euroclear, they are under no obligation to perform or continue such procedures and such procedures may be changed or discontinued at any time.

Notices

We and the Trustee will send notices only to direct holders of the New Notes, using their addresses as listed in the Trustee’s records. (Section 106)

Prescription Period

Any money that we deposit with the Trustee or any paying agent for the payment of principal or any interest on any global note of any series that remains unclaimed for two years after the date upon which the principal and interest are due and payable will be repaid to us. After that time, the holder of the global note will be able to seek any payment to which that holder may be entitled to collect only from us. (Section 1006)

The Clearing System

DTC.

DTC has advised us as follows:

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Guarantees

BP will fully and unconditionally guarantee the payment of the principal of, premium, if any, and interest on the New Notes, including certain additional amounts which may be payable under the guarantees, as described below under “—Additional Amounts”. BP guarantees the payment of such amounts when such amounts become due and payable, whether at the stated maturity of the New Notes, by declaration of acceleration, call for redemption or otherwise.

Additional Amounts

The government of any jurisdiction where BP is incorporated may require BP to withhold or deduct amounts from any amounts to be paid under the Guarantees for or on account of taxes or any other governmental charges. If the jurisdiction requires a withholding or deduction of this type, BP may be required to pay you an additional amount so that the net amount you receive will be the amount specified in the New Note to which you are entitled. However, in order for you to be entitled to receive the additional amount, you must not be resident in the jurisdiction that requires the withholding or deduction.

BP will not have to pay additional amounts under any of the following circumstances:

These provisions will also apply to any taxes or governmental charges imposed by any jurisdiction in which a successor to BP is organized. (Section 1010)

Governing Law

The New Indenture, the New Notes and the Guarantees will be governed by and construed in accordance with the laws of the State of New York.

Any legal proceeding arising out of or based upon the New Indenture, the New Notes or the Guarantees may be instituted in any state or federal court in the Borough of Manhattan in New York City, New York.

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The Trustee

The Bank of New York Mellon Trust Company, N.A. will be the trustee under the New Indenture. The trustee has two principal functions:

BP and several of its subsidiaries maintain banking relations with the trustee group of companies in the ordinary course of their business.

The Bank of New York Mellon Trust Company, N.A. acts as trustee under other indentures under which BP acts as guarantor.

If an event of default occurs, or an event occurs that would be an event of default if the requirements for giving us default notice or our default having to exist for a specific period of time were disregarded, the trustee may therefore be considered to have a conflicting interest with respect to the New Notes or the Indenture for purposes of the Trust Indenture Act of 1939. In that case, the trustee may be required to resign as trustee under the Indenture and we would be required to appoint a successor trustee.

Mergers and Similar Events

We are generally permitted to consolidate or merge with another company or firm. We are also permitted to sell or lease substantially all of our assets to another corporation or other entity or to buy or lease substantially all of the assets of another corporation or other entity. No vote by holders of New Notes approving any of these actions is required, unless as part of the transaction we make changes to the New Indenture requiring your approval, as described below under “—Modification and Waiver”. We may take these actions as part of a transaction involving outside third parties or as part of an internal corporate reorganization. We may take these actions even if they result in:

We have no obligation under the New Indenture to seek to avoid these results, or any other legal or financial effects that are disadvantageous to you, in connection with a merger, consolidation or sale or lease of assets that is permitted under the New Indenture. However, we may not take any of these actions unless all the following conditions are met:

It is possible that the merger, sale or lease of assets or other transaction would cause some of our property to become subject to a mortgage, security interest, lien or other legal mechanism giving lenders preferential rights in that property over other lenders or over our general creditors if we fail to pay them back.

It is possible that the U.S. Internal Revenue Service may deem a merger or other similar transaction to cause an exchange for U.S. federal income tax purposes of New Notes for new securities by the holders of the New Notes. This could result in the recognition of taxable gain or loss for U.S. federal income tax purposes and possible other adverse tax consequences.

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Modification and Waiver

There are three types of changes we can make to the New Indenture and the New Notes.

Changes Requiring Your Approval

First, there are changes that cannot be made to your New Notes without your specific approval. We must obtain your specified approval in order to:

Changes Requiring a Majority Vote

The second type of change to the New Indenture and the New Notes is the kind that requires a vote in favor by holders of New Notes owning a majority of the principal amount of the New Notes. Most changes fall into this category, except for clarifying changes and other changes that would not adversely affect holders of the New Notes in any material respect. The same vote would be required for us to obtain a waiver of all or part of the covenants described in this summary or a waiver of a past default. However, we cannot obtain a waiver of a payment default or any other aspect of the New Indenture or the New Notes listed in the first category described above under “—Changes Requiring Your Approval” unless we obtain your individual consent to the waiver. (Section 513)

Changes Not Requiring Approval

The third type of change does not require any vote by holders of New Notes. This type is limited to clarifications and other changes that would not adversely affect holders of the New Notes in any material respect. (Section 901)

Further Details Concerning Voting

When taking a vote, we will use the following rules to decide how much principal amount to attribute to the New Notes:

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Ranking

The New Notes are not secured by any of our property or assets. Accordingly, your ownership of New Notes means you are one of our unsecured creditors. The New Notes are not subordinated to any of our other debt obligations and therefore they rank equally with all our other unsecured and unsubordinated indebtedness.

Events of Default

You will have special rights if an event of default occurs and is not cured, as described later in this subsection.

What Is an Event of Default?

The term “event of default” means, with respect to the New Notes, any of the following:

Remedies If an Event of Default Occurs.

If an event of default has occurred and has not been cured, the Trustee or the holders of 25% in principal amount of the New Notes of the affected series may declare the entire principal amount of all the New Notes of that series to be due and immediately payable. This is called a declaration of acceleration of maturity. A declaration of acceleration of maturity may be canceled by the holders of at least a majority in principal amount of the New Notes of the affected series if:

Except in cases of default, where the Trustee has some special duties, the Trustee is not required to take any action under the New Indenture at the request of any holders unless the holders offer the Trustee reasonable protection from expenses and liability. This protection is called an indemnity. (Section 603) If reasonable indemnity is provided, the holders of a majority in principal amount of the outstanding New Notes of the relevant series may direct the time, method and place of conducting any lawsuit or other formal legal action seeking any remedy available to the Trustee. These majority holders may also direct the Trustee in performing any other action under the New Indenture. (Section 512)

Before you bypass the Trustee and bring your own lawsuit or other formal legal action or take other steps to enforce your rights or protect your interests relating to the New Notes, the following must occur:

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We will furnish to the trustee every year a written statement of certain of our officers certifying that, to their knowledge, we are in compliance with the New Indenture and the New Notes, or else specifying any default. (Section 1008)

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MATERIAL U.S. FEDERAL INCOME TAX CONSIDERATIONS

The following discussion summarizes certain U.S. federal income tax consequences (i) of the exchange of Old Notes for the New Notes pursuant to the Exchange Offers, (ii) of the ownership of the New Notes acquired in the Exchange Offers, and (iii) to holders of Old Notes that do not tender their Old Notes pursuant to the Exchange Offers. It applies to you only if (i) you participate in the Exchange Offers, you acquire your New Notes in the Exchange Offers and you hold your Old Notes and New Notes as capital assets for U.S. federal income tax purposes or (ii) you do not participate in the Exchange Offers and you hold your Old Notes as capital assets for U.S. federal income tax purposes. This section does not apply to you if you are a member of a class of holders subject to special rules, such as:

If a partnership (including any entity classified as a partnership for U.S. federal income tax purposes) holds the Old Notes or the New Notes, the tax treatment of a partner in the partnership generally would depend upon the status of the partner and the activities of the partnership. If you are a partner of a partnership holding the Old Notes or the New Notes, you should consult your tax advisor regarding the tax consequences of the Exchange Offers and the ownership of New Notes.

This summary is based on the U.S. Internal Revenue Code of 1986, as amended (the “Code”), its legislative history, existing and proposed regulations under the Code, published rulings and court decisions, all as currently in effect, and subject to change, possibly on a retroactive basis. In addition, this summary does not address any alternative minimum tax considerations, the Medicare tax on net investment income, the estate and gift tax, or any tax consequences arising out of the laws of any state, local or foreign jurisdiction.

Please consult your own tax advisor concerning the consequences of the Exchange Offers and of owning the New Notes, or of retaining the Old Notes, in your particular circumstances under the Code and the laws of any other taxing jurisdiction.

Tax Consequences to Exchanging U.S. Holders

This subsection describes the tax consequences to a U.S. Holder that tenders Old Notes for New Notes. You are a “U.S. Holder” if you are a beneficial owner of the Old Notes and you are:

If you are not a U.S. Holder, or if you are a U.S. Holder that does not tender Old Notes for New Notes, this subsection does not apply to you and you should refer to “—Tax Consequences to Exchanging Non-U.S. Holders” or “—Tax Consequences to Non-Exchanging Holders” below.

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The Exchange Offers

Characterization of the Exchange of Old Notes for New Notes. The exchange of the Old Notes for the New Notes pursuant to the Exchange Offers will constitute a taxable disposition of the Old Notes for U.S. federal income tax purposes if the exchange results in a “significant modification” of the Old Notes. U.S. Treasury regulations provide that the substitution of a new obligor on a recourse debt instrument generally is a significant modification and, therefore, a taxable disposition of the Old Notes. As a result, and although the matter is not free from doubt, under the U.S. Treasury regulations described above, any exchange of Old Notes for New Notes pursuant to the Exchange Offers should constitute a significant modification of the terms of the Old Notes under the “change in obligor” test. The discussion below assumes that the exchange of Old Notes for New Notes will be treated as a significant modification.

Tax Consequences of the Early Participation Premium. The tax treatment of the portion of the Total Consideration attributable to the Early Participation Premium is uncertain. The portion of the Total Consideration attributable to the Early Participation Premium may be treated as additional consideration received for the Old Notes, in which case the Early Participation Premium would be taken into account in determining your gain or loss in respect of the exchange. The portion of the Total Consideration attributable to the Early Participation Premium could conceivably be treated, however, as a separate fee, in which case the portion of the Total Consideration attributable to the Early Participation Premium would be treated as ordinary income and separately taxable. While the proper treatment of the portion of the Total Consideration attributable to the Early Participation Premium is not free from doubt, we intend to take the position that the portion of the Total Consideration attributable to the Early Participation Premium is paid to you as consideration for the Old Notes and, except as otherwise noted below, the remainder of this discussion assumes that the portion of the Total Consideration attributable to the Early Participation Premium will be so treated. Accordingly, references in this discussion to New Notes received in the exchange (and cash for fractional amounts of New Notes) include New Notes (and cash) attributable to the Early Participation Premium.

General Tax Consequences of Exchange of Old Notes for New Notes. You will recognize gain or loss (if any) on the exchange of Old Notes for New Notes (which loss may be subject to deferral under the “wash sale” provisions of the Code) in an amount equal to the difference between the amount you realize on the exchange and your adjusted tax basis in the Old Notes. The amount you realize in the exchange will equal the sum of (a) the issue price of the New Notes you receive in the exchange (determined in the manner described below) and (b) the cash portion of the Total Consideration and any cash that you receive in lieu of fractional amounts of New Notes, minus (c) the accrued and unpaid interest on the Old Notes at the time of the exchange.

Your adjusted tax basis in your Old Notes will generally be the U.S. dollar cost of such notes, increased by any market discount previously included in income with respect to your Old Notes and decreased (but not below zero) by bond premium that you have amortized with respect to the Old Notes.

Except as described below with respect to accrued market discount, gain or loss generally will be capital gain or loss, and would be long-term capital gain or loss if your holding period for the Old Notes is more than one year at the time of the exchange. Capital gain of a non-corporate U.S. holder generally would be taxed at preferential rates where the property is held for more than one year. The deductibility of capital losses is subject to limitations.

You will be considered to have acquired an Old Note with market discount if the stated principal amount of such Old Note exceeded your initial tax basis for such Old Note by more than a de minimis amount. If your Old Notes were acquired with market discount, any gain that you recognize on the exchange of Old Notes for the New Notes would be treated as ordinary income to the extent of the market discount that accrued during your period of ownership, unless you previously had elected to include market discount in income as it accrued for U.S. federal income tax purposes.

To the extent not previously included in income, you should generally recognize as ordinary income any accrued but unpaid interest on the Old Notes, as of the Settlement Date, even though you will not actually receive such amounts at such time.

Ownership of the New Notes – Generally

Pre-issuance accrued interest. A portion of the issue price of the New Notes will be attributable to pre-issuance accrued interest. An election may be made to decrease the issue price of a New Note by the amount of the pre-

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issuance accrued interest. If this election is made, a portion of the first stated interest payment would be treated as a return of the excluded pre-issuance accrued interest and not as an amount payable on the New Note.

Payments of interest. Subject to the discussion above on pre-issuance accrued interest, stated interest on the New Notes generally will be taxable to you as ordinary income at the time that it is paid or accrued in accordance with your method of accounting for U.S. federal income tax purposes.

Original Issue Discount. If the issue price of a New Note is less than its principal amount by an amount more than or equal to the de minimis amount, your New Note would be treated as issued with original issue discount (“OID”) in an amount equal to such difference. The issue price of the New Notes will depend on whether the New Notes will be treated as publicly traded for U.S. federal income tax purposes. We believe that the New Notes will be treated as publicly traded for U.S. federal income tax purposes, and the remainder of the discussion assumes such treatment. We accordingly believe, and intend to take the position, that the issue price of a New Note will equal the fair market value of the New Note on its issue date for U.S. federal income tax purposes. Because the New Notes will have substantially identical terms to the Old Notes, it is likely, but not certain, that the fair market value of the New Notes as of their issue date will be similar to the trading price for the corresponding Old Notes on such date. Accordingly, New Notes issued in exchange for Old Notes that are currently trading at a discount to their principal amount may be expected to have a fair market value as of their issue date, and thus an issue price, that is less than the principal amount of such New Notes, which will cause such New Notes to be issued with OID if the issue price is less than the principal amount by an amount more than or equal to the de minimis amount, as described above. The de minimis amount equals 1/4 of 1% of the New Note’s principal amount multiplied by the number of complete years to its maturity. You would be required to include such OID in income on a constant yield method over the term of the New Note even if you have not received a cash payment in respect of the OID.

Bond Premium. If immediately after the exchange you have an initial tax basis in a New Note in excess of the stated principal amount of the New Note, the New Note would be treated as issued with bond premium. Generally, you may elect to amortize such bond premium as an offset to stated interest income in respect of the New Note, using a constant yield method prescribed under applicable U.S. Treasury regulations, over the remaining term of the New Note. If you elect to amortize bond premium, you would reduce your basis in the New Note by the amount of the premium used to offset stated interest. You should consult your tax advisor regarding the availability of an election to amortize bond premium for U.S. federal income tax purposes.

Sale, exchange or other disposition. Upon the sale, exchange or other disposition of New Notes, you would recognize gain or loss equal to the difference, if any, between the amount realized on the sale, exchange or other disposition (excluding accrued but unpaid stated interest, which generally would be taxable as interest to the extent not previously included in income) and your adjusted tax basis in the New Notes. Your adjusted tax basis in the New Notes would be the issue price of the New Notes, increased by any OID previously included in income with respect to your New Notes, decreased (but not below zero) by bond premium that you have amortized with respect to the New Notes and decreased by any pre-issuance accrued interest that you have elected to reduce the issue price by.

Such gain or loss will be capital gain or loss, and would be long-term capital gain or loss if your holding period for the New Notes is more than one year at the time of the sale, exchange or other disposition. Your holding period for the New Notes would not include your holding period for the Old Notes exchanged and will begin on the day after the completion of the exchange for U.S. federal income tax purposes. Capital gain of a non-corporate U.S. holder generally would be taxed at preferential rates where the property is held for more than one year. The deductibility of capital losses is subject to limitations.

Tax Consequences to Exchanging Non-U.S. Holders

This subsection describes the tax consequences to a Non-U.S. Holder that exchanges Old Notes for New Notes. You are a Non-U.S. Holder if you are a beneficial owner of Old Notes and you are, for U.S. federal income tax purposes:

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Special rules may apply to certain Non-U.S. Holders such as “controlled foreign corporations” and “passive foreign investment companies.” Such Non-U.S. Holders should consult their own tax advisors to determine the U.S. federal, state, local and other tax consequences that may be relevant to them.

If you are a U.S. Holder or a Non-U.S. Holder that does not exchange Old Notes for New Notes, this subsection does not apply to you.

The Exchange Offers

Gain characterized as capital gain. Subject to the discussions below in respect of backup withholding and the portion of the Total Consideration attributable to the Early Participation Premium, you generally would not be subject to U.S. federal income tax on gain realized through the Exchange Offers, unless:

If you are a corporate Non-U.S. Holder, “effectively connected” gains that you recognize may also, under certain circumstances, be subject to an additional “branch profits tax” at a 30% rate or at a lower rate if you are eligible for the benefits of an income tax treaty that provides for a lower rate.

As discussed above under “—Tax Consequences to Exchanging U.S. Holders—The Exchange Offers—Tax Consequences of the Early Participation Premium,” however, the portion of the Total Consideration attributable to the Early Participation Premium could conceivably be treated as a separate fee, in which case the receipt of the portion of the Total Consideration attributable to the Early Participation Premium by a Non-U.S. Holder would be subject to U.S. federal withholding tax of 30%, unless reduced or eliminated by an applicable treaty. We intend to treat the portion of the Total Consideration attributable to the Early Participation Premium paid to non-U.S. Holders as additional consideration for the Old Notes. Accordingly, we do not intend to withhold U.S. federal income tax from the portion of the Total Consideration attributable to the Early Participation Premium.

Gain characterized as interest income. If you are a Non-U.S. Holder of Old Notes, and subject to the discussion of backup withholding below, you generally would not be subject to U.S. federal withholding tax upon the exchange in respect of a gain attributable to accrued but unpaid interest. If the interest is effectively connected with the conduct by you of a trade or business in the United States (and, if required by an applicable income tax treaty, is attributable to a U.S. permanent establishment that you maintain), such interest would be subject to U.S. federal income tax on a net income basis generally in the same manner as if you were a U.S. Holder, and if you are a foreign corporation, may also be subject to an additional 30% branch profits tax (or lower applicable treaty rate).

Ownership of the New Notes

Payments of interest. Under U.S. federal income tax law, and subject to the discussion of backup withholding below, if you are a Non-U.S. Holder of New Notes acquired through the Exchange Offers, interest on the New Notes paid to you would be exempt from U.S. federal income tax, including withholding tax, if:

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and the withholding foreign partnership, qualified intermediary or U.S. branch has received documentation upon which it may rely to treat the payment as made to a non-U.S. person that is, for U.S. federal income tax purposes, the beneficial owner of the payment on the New Notes in accordance with U.S. Treasury regulations (or, in the case of a qualified intermediary, in accordance with its agreement with the IRS);

Sale, exchange or other disposition of the New Notes. If you are a Non-U.S. Holder of New Notes acquired through the Exchange Offers, you generally would not be subject to U.S. federal income tax on gain realized on the sale, exchange or other disposition of such New Notes, unless you fall into one of the exceptions discussed above under “—Tax Consequences to Exchanging Non-U.S. Holders—The Exchange Offers—Gain characterized as capital gain.”

Tax Consequences to Non-Exchanging Holders

Because the terms of the Old Notes will not be modified in connection with the Exchange Offers, the exchange of some of the Old Notes should not have any U.S. federal income tax consequences for holders of the Old Notes who do not tender their Old Notes or whose Old Notes are not accepted for exchange in the Exchange Offers.

Information Reporting and Backup Withholding

In general, if you are a non-corporate U.S. Holder, we and other payors may be required to report to the IRS payments of amounts received pursuant to the Exchange Offers, payments of principal of and any premium and interest on your Old Notes and New Notes, and the accrual of OID, if any, on a New Note. In addition, we and other payors may be required to report to the IRS any payment of proceeds of the sale of your Old Notes as part of the exchange and your New Notes before maturity. Additionally, unless you are an exempt recipient, backup withholding would apply to any payments, including payments of OID, if you fail to provide an accurate taxpayer identification number, or (in the case of interest payments) you are notified by the IRS that you have failed to report all interest and dividends required to be shown on your federal income tax returns.

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In general, if you are a Non-U.S. Holder, payments of amounts received pursuant to the Exchange Offers and payments of principal, premium, if any, or interest, including OID, made by us and other payors to you would not be subject to backup withholding and information reporting; provided that the certification requirements described above under “—Tax Consequences to Exchanging Non-U.S. Holders” are satisfied or you otherwise establish an exemption. However, we and other payors would be required to report payments of interest on your New Notes on IRS Form 1042-S even if the payments are not otherwise subject to information reporting requirements. In addition, payment of the proceeds from the sale of New Notes effected at a United States office of a broker would not be subject to backup withholding and information reporting if (i) the payor or the broker does not have actual knowledge or reason to know that you are a United States person and (ii) you have furnished to the broker an appropriate IRS Form W-8, an acceptable substitute form or other documentation upon which it may rely to treat the payment as made to a non-United States person.

In general, with respect to payments to a Non-U.S. Holder, payment of the proceeds from the sale of New Notes effected at a foreign office of a broker would not be subject to information reporting or backup withholding. However, a sale effected at a foreign office of a broker could be subject to information reporting and backup withholding in the same manner as a sale within the United States if: (i) the broker has certain connections to the United States; (ii) the proceeds or confirmation are sent to a United States address; or (iii) the sale has certain other specified connections with the United States.

Withholdable Payments to Foreign Financial Entities and Other Foreign Entities (FATCA)

A 30% withholding tax may be imposed on certain payments to a holder or to certain foreign financial institutions, investment funds and other non-United States persons receiving payments on the holder’s behalf if such holder or such persons fail to comply with certain information reporting requirements (“FATCA withholding”). Amounts that a holder receives on the New Notes could be affected by this withholding if such holder is subject to the information reporting requirements and fails to comply with them or if such holder holds the New Notes through another person (e.g., a foreign bank or broker) that is subject to withholding because it fails to comply with these requirements (even if such holder would not otherwise have been subject to withholding). However, withholding will not apply to payments of gross proceeds from a sale or other disposition of the New Notes before 1 January 2019. Accordingly, FATCA withholding will not apply to amounts that are paid to a holder upon a disposition of the Old Notes pursuant to the Exchange Offers. Holders should consult their own tax advisors regarding the relevant United States law and other official guidance on FATCA withholding.

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MATERIAL U.K. TAX CONSIDERATIONS

The following is a summary of the material U.K. tax consequences at the date hereof of disposing of Old Notes and acquiring New Notes under the Exchange Offer and the ownership and disposal of the New Notes, but it does not purport to be a comprehensive description of all of the U.K. tax considerations that may be relevant to a decision to participate in the Exchange Offer. Except where the context otherwise requires, the comments relate only to the position of persons who are absolute beneficial owners of the Old Notes or New Notes (as the case may be) and do not deal with the position of certain classes of holders such as dealers. The summary is based on current U.K. tax legislation and current practice of Her Majesty’s Revenue and Customs (“HMRC”), as appropriate, all of which are subject to change at any time, possibly with retrospective effect.

Please consult your own tax advisor on the consequences of participating in the Exchange Offer and owning the New Notes in your particular circumstances under the laws of the U.K. and any other relevant taxing jurisdiction.

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Any payments made by BP under the guarantee to holders of the New Notes may have a U.K. source for U.K. tax purposes.

The Issuer has been advised that, although the point is not free from doubt, a payment under the guarantee in respect of interest should be treated as a payment of interest and a payment under the guarantee in respect of principal should be treated as principal. Consequently, only guarantee payments in respect of interest should be subject to the same withholding tax implications described at Section 2 above, and recipients may be assessed for U.K. tax on the receipt of these payments on the basis noted at Section 2(H) above.

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No U.K. stamp duty or stamp duty reserve tax will generally be payable by a holder of the New Notes on the redemption of the New Notes by the Issuer.

No liability for U.K. stamp duty or stamp duty reserve tax will arise on a transfer of, or an agreement to transfer, the New Notes unless:

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Where there is a charge to U.K. stamp duty or stamp duty reserve tax, the rate of charge is normally 0.5% on the amount or value of the consideration for the transfer.

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NOTICES TO CERTAIN NON-U.S. HOLDERS

General

No action has been or will be taken in any jurisdiction that would permit a public offering of the New Notes or the possession, circulation or distribution of this prospectus or any material relating to us, the Old Notes or the New Notes in any jurisdiction where action for that purpose is required. Accordingly, the New Notes offered in the Exchange Offers may not be offered, sold or exchanged, directly or indirectly, and neither this prospectus nor any other offering material or advertisements in connection with the Exchange Offers may be distributed or published, in or from any such country or jurisdiction, except in compliance with any applicable rules or regulations of any such country or jurisdiction.

This prospectus does not constitute an offer to buy or sell or a solicitation of an offer to buy or sell either Old Notes or New Notes in any jurisdiction in which, or to or from any person to or from whom it is unlawful to make such offer or solicitation under applicable securities laws or otherwise. The distribution of this prospectus in certain jurisdictions (including, but not limited to, the EEA, the United Kingdom, Belgium, France, Italy, Hong Kong, Japan and Singapore) may be restricted by law. Persons into whose possession this prospectus comes are required by us, the Dealer Managers and the Exchange Agent to inform themselves about, and to observe, any such restrictions. In those jurisdictions where the securities, blue sky or other laws require the Exchange Offers to be made by a licensed broker or dealer and the Dealer Managers or any of their affiliates is a licensed broker or dealer in any such jurisdiction, such Exchange Offers shall be deemed to be made by such Dealer Manager or such affiliate (as the case may be) on our behalf in such jurisdiction.

The New Notes will be issued only in minimum denominations of $1,000 and whole multiples of $1,000 thereafter. See “Description of the New Notes and Guarantees—General.” We will not accept tenders of Old Notes if such tender would result in the holder thereof receiving in the applicable Exchange Offer an amount of New Notes below the applicable minimum denomination.

European Economic Area

The New Notes are not intended to be offered, sold or otherwise made available to and should not be offered, sold or otherwise made available to any retail investor in the European Economic Area (“EEA”). For these purposes, a retail investor means a person who is one (or more) of: (i) a retail client as defined in point (11) of Article 4(1) of Directive 2014/65/EU (as amended, “MiFID II”); or (ii) a customer within the meaning of Directive 2002/92/EC (as amended, the “Insurance Mediation Directive”), where that customer would not qualify as a professional client as defined in point (10) of Article 4(1) of MiFID II; or (iii) not a qualified investor as defined in Directive 2003/71/EC (as amended, the “Prospectus Directive”). Consequently no key information document required by Regulation (EU) No 1286/2014 (as amended, the “PRIIPs Regulation”) for offering or selling the New Notes or otherwise making them available to retail investors in the EEA has been prepared and therefore offering or selling the New Notes or otherwise making them available to any retail investor in the EEA may be unlawful under the PRIIPs Regulation. This prospectus has been prepared on the basis that any offer of New Notes in any Member State of the EEA will be made pursuant to an exemption under the Prospectus Directive from the requirement to publish a prospectus for offers of New Notes. This prospectus is not a prospectus for the purposes of the Prospectus Directive.

MiFID II product governance / Professional investors and ECPs only target market—In the EEA and solely for the purposes of the product approval process conducted by any Dealer Manager who is a manufacturer with respect to the New Notes for the purposes of the MiFID II product governance rule under EU Delegated Directive 2017/593 (each, a “manufacturer”), the manufacturers’ target market assessment in respect of the New Notes has led to the conclusion that: (i) the target market for the New Notes is eligible counterparties and professional clients only, each as defined in MiFID II; and (ii) all channels for distribution of the New Notes to eligible counterparties and professional clients are appropriate. Any person subsequently offering, selling or recommending the New Notes (a “distributor”) should take into consideration the manufacturers’ target market assessment; however, a distributor subject to MiFID II is responsible for undertaking its own target market assessment in respect of the New Notes (by

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either adopting or refining the manufacturers’ target market assessment) and determining appropriate distribution channels.

Belgium

Neither the Prospectus nor any other documents or materials relating to the Exchange Offers have been submitted to or will be submitted for approval or recognition to the Belgian Financial Services and Markets Authority (“Autorité des services et marchés financiers”/“Autoriteit voor Financiële Diensten en Markten”). The Exchange Offers are not being, and may not be, made in Belgium by way of a public offering, as defined in Articles 3, §1, 1° and 6, §1 of the Belgian Law of April 1, 2007 on public takeover bids (“loi relative aux offres publiques d’acquisition”/“wet op de openbare overnamebiedingen”) (the “Belgian Takeover Law”) or as defined in Article 3, §1 of the Belgian Law of June 16, 2006 on the public offer of investment instruments and the admission to trading of investment instruments on a regulated market (“loi relative aux offres publiques d’instruments de placement et aux admissions d’instruments de placement à la négociation sur des marchés réglementés”/“wet op de openbare aanbieding van beleggingsinstrumenten en de toelating van beleggingsinstrumenten tot de verhandeling op een gereglementeerde markt”) (the “Belgian Prospectus Law”), both as amended or replaced from time to time. Accordingly, the Exchange Offers may not be, and are not being, advertised and the Exchange Offers will not be extended, and neither the Prospectus nor any other documents or materials relating to the Exchange Offers (including any memorandum, information circular, brochure or any similar documents) has been or shall be distributed or made available, directly or indirectly, to any person in Belgium other than (i) to persons which are “qualified investors” (“investisseurs qualifiés”/“gekwalificeerde beleggers”) as defined in Article 10, §1 of the Belgian Prospectus Law, acting on their own account, as referred to in Article 6, §3 of the Belgian Takeover Law or (ii) in any other circumstances set out in Article 6, §4 of the Belgian Takeover Law and Article 3, §4 of the Belgian Prospectus Law. The Prospectus has been issued only for the personal use of the above qualified investors and exclusively for the purpose of the Exchange Offers. Accordingly, the information contained in the Prospectus or in any other documents or materials relating to the Exchange Offers may not be used for any other purpose or disclosed or distributed to any other person in Belgium.

France

The Exchange Offers are not being made, directly or indirectly, to the public in the Republic of France. Neither the Prospectus nor any other documents or materials relating to the Exchange Offers have been or shall be distributed to the public in France and only (i) providers of investment services relating to portfolio management for the account of third parties (personnes fournissant le service d’investissement de gestion de portefeuille pour compte de tiers) and/or (ii) qualified investors (investisseurs qualifiés) other than individuals, in each case acting on their own account and all as defined in, and in accordance with, Articles L.411-1, L.411-2, D.321-1 and D.411-1 of the French Code Monétaire et Financier, are eligible to participate in the Exchange Offers. The Prospectus and any other document or material relating to the Exchange Offers have not been and will not be submitted for clearance to nor approved by the Autorité des marchés financiers.”

Italy

None of the Exchange Offers, the Prospectus or any other documents or materials relating to the Exchange Offers or the New Notes have been or will be submitted to the clearance procedure of the Commissione Nazionale per le Società e la Borsa (“CONSOB”). The Exchange Offers are being carried out in the Republic of Italy as exempted offers pursuant to article 101-bis, paragraph 3-bis of the Legislative Decree No. 58 of 24 February 1998, as amended (the “Financial Services Act”) and article 35-bis, paragraph 3, of CONSOB Regulation No. 11971 of 14 May 1999, as amended (the “Issuers’ Regulation”) and, therefore, are intended for, and directed only at, qualified investors (investitori qualificati) (the “Italian Qualified Investors”), as defined pursuant to Article 100, paragraph 1, letter (a) of the Financial Services Act and Article 34-ter, paragraph 1, letter (b) of the Issuers’ Regulation. Accordingly, the Exchange Offers cannot be promoted, nor may copies of any document related thereto or to the New Notes be distributed, mailed or otherwise forwarded, or sent, to the public in Italy, whether by mail or by any means or other instrument (including, without limitation, telephonically or electronically) or any facility of a national securities exchange available in Italy, other than to Italian Qualified Investors. Persons receiving this prospectus must not forward, distribute or send it in or into or from Italy. Noteholders or beneficial owners of the Old Notes that are resident or located in Italy can offer to exchange the notes pursuant to the Exchange Offers through authorized persons (such as investment firms, banks or financial intermediaries permitted to conduct such activities in Italy in accordance with the Financial Services Act, CONSOB Regulation No. 16190 of 29 October 2007, as amended from time to time, and Legislative Decree No. 385 of 1 September 1993, as amended) and in compliance with applicable laws and regulations or with requirements imposed by CONSOB or any other Italian authority. Each intermediary must comply with the applicable laws and regulations concerning information duties vis-à-vis its clients in connection with the Old Notes, the New Notes, the Exchange Offers or the Prospectus.

United Kingdom

Each Dealer Manager has further represented and agreed that:

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This prospectus is only being distributed to and is only directed at (i) persons who are outside the United Kingdom or (ii) investment professionals falling within Article 19(5) of the Financial Services and Markets Act 2000 (Financial Promotion) Order 2005 (the “Order”) or (iii) high net worth entities, and other persons to whom it may lawfully be communicated, falling within Article 49(2)(a) to (d) of the Order (all such persons together being referred to as “relevant persons”). The New Notes are only available to, and any invitation, offer or agreement to subscribe, purchase or otherwise acquire the New Notes will be engaged in only with, relevant persons. Any person who is not a relevant person should not act or rely on this document or any of its contents.

Hong Kong

The New Notes may not be offered or sold by means of any document other than (i) in circumstances which do not constitute an offer to the public within the meaning of the Companies Ordinance (Cap.32, Laws of Hong Kong), or (ii) to “professional investors” within the meaning of the Securities and Futures Ordinance (Cap.571, Laws of Hong Kong) and any rules made thereunder, or (iii) in other circumstances which do not result in the document being a “prospectus” within the meaning of the Companies Ordinance (Cap.32, Laws of Hong Kong), and no advertisement, invitation or document relating to the New Notes may be issued or may be in the possession of any person for the purpose of issue (in each case whether in Hong Kong or elsewhere), which is directed at, or the contents of which are likely to be accessed or read by, the public in Hong Kong (except if permitted to do so under the laws of Hong Kong) other than with respect to New Notes which are or are intended to be disposed of only to persons outside Hong Kong or only to “professional investors” within the meaning of the Securities and Futures Ordinance (Cap. 571, Laws of Hong Kong) and any rules made thereunder.

Japan

The New Notes have not been and will not be registered under the Financial Instruments and Exchange Law of Japan (the Financial Instruments and Exchange Law) and each underwriter has agreed that it will not offer or sell any New Notes, directly or indirectly, in Japan or to, or for the benefit of, any resident of Japan (which term as used herein means any person resident in Japan, including any corporation or other entity organized under the laws of Japan), or to others for re-offering or resale, directly or indirectly, in Japan or to a resident of Japan, except pursuant to an exemption from the registration requirements of, and otherwise in compliance with, the Financial Instruments and Exchange Law and any other applicable laws, regulations and ministerial guidelines of Japan.

Singapore

This prospectus has not been registered as a prospectus with the Monetary Authority of Singapore. Accordingly, and if the Issuer has not notified the dealer(s) on the classification of the New Notes under and pursuant to Section 309(B)(1) of the Securities and Futures Act, Chapter 289 Singapore (the “SFA”), this prospectus and any other document or material in connection with the offer or sale, or invitation for subscription or purchase, of the New Notes may not be circulated or distributed, nor may the New Notes be offered or sold, or be made the subject of an invitation for subscription or purchase, whether directly or indirectly, to persons in Singapore other than (i) to an institutional investor under Section 274 of Chapter 289 of the SFA, (ii) to a relevant person, or any person pursuant to Section 275(1A), and in accordance with the conditions, specified in Section 275 of the SFA or (iii) otherwise pursuant to, and in accordance with the conditions of, any other applicable provision of the SFA.

Where the New Notes are subscribed or purchased under Section 275 of the SFA by a relevant person which is: (a) a corporation (which is not an accredited investor) the sole business of which is to hold investments and the entire share capital of which is owned by one or more individuals, each of whom is an accredited investor; or (b) a trust (where the trustee is not an accredited investor) whose sole purpose is to hold investments and each beneficiary is an accredited investor, shares, debentures and units of shares and debentures of that corporation or the beneficiaries’ rights and interest in that trust shall not be transferable for six months after that corporation or that trust has acquired the New Notes under Section 275 except: (1) to an institutional investor under Section 274 of the SFA or to a relevant person, or any person pursuant to Section 275(1A), and in accordance with the conditions, specified in Section 275 of the SFA; (2) where no consideration is given for the transfer; or (3) by operation of law.

Singapore Securities and Futures Act Product Classification—Solely for the purposes of its obligations pursuant to sections 309B(1)(a) and 309B(1)(c) of the SFA, the Issuer has determined, and hereby notifies all relevant persons (as defined in Section 309A of the SFA) that the New Notes are “prescribed capital markets products” (as defined in the Securities and Futures (Capital Markets Products) Regulations 2018) and Excluded Investment Products (as defined in MAS Notice SFA 04-N12: Notice on the Sale of Investment Products and MAS Notice FAA-N16: Notice on Recommendations on Investment Products).

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VALIDITY OF NOTES

The validity of the New Notes and Guarantees will be passed upon for us by Sullivan & Cromwell LLP as to certain matters of New York law. The validity of the New Notes and Guarantees will be passed upon for us by our Associate General Counsel – Global Corporate and Alternative Energy as to certain matters of English law.

Certain legal matters in connection with the Exchange Offers will be passed upon for the Dealer Managers by Cleary Gottlieb Steen & Hamilton LLP.

EXPERTS

The BP Group financial statements appearing in BP’s Annual Report on Form 20-F for the year ended December 31, 2017 and the effectiveness of BP’s internal control over financial reporting as of December 31, 2017, have been audited by Ernst & Young LLP, independent registered public accounting firm, as set forth in their report thereon included therein and incorporated herein by reference. Such BP Group financial statements have been incorporated herein by reference in reliance upon such reports given on the authority of such firm as experts in accounting and auditing.

DeGolyer and MacNaughton, independent petroleum engineering consultants, performed an independent evaluation of net proved oil, condensate, natural gas liquids and gas reserves, as of December 31, 2017 for certain properties owned by PJSC Rosneft Oil Company. DeGolyer and MacNaughton has delivered to us its summary letter report describing its procedures and conclusions, a copy of which appears as Exhibit 15.2 to our 2017 Annual Report on Form 20-F, which is incorporated herein by reference.

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BP Capital Markets p.l.c.

PROSPECTUS

The Exchange Agent and Information Agent for the Exchange Offers for the Old Notes is:

D.F. King & Co., Inc.

48 Wall Street, 22nd Floor

New York, NY 10005

bp@dfking.com

Banks and Brokers call: (212) 269-5550

Toll-free (U.S. only): (877) 674-6273

By Facsimile (for eligible institutions only): (212) 709-3328

Confirmation: (212) 269-5552

Attention: Andrew Beck

Any questions or requests for assistance may be directed to the Dealer Managers at the addresses and telephone numbers set forth below. Requests for additional copies of this prospectus may be directed to the Information Agent. Beneficial owners may also contact their custodian for assistance concerning the Exchange Offers.

The Dealer Managers for the Exchange Offers for the Old Notes are: