UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM 12b-25

NOTIFICATION OF LATE FILING

(Check One):

Form 10-K

Form 20-F

Form 11-K

Form 10-Q

Form N-SAR

Form N-CSR

For Period Ended: December 31, 2003

	Transition Report on Form 10-K
	Transition Report on Form 20-F
	Transition Report on Form 11-K
	Transition Report on Form 10-Q
	Transition Report on Form N-SAR

For the Transition Period Ended:             

Nothing in this form shall be construed to imply that the Commission has verified any information contained herein.

If the notification relates to a portion of the filing checked above, identify the Item(s) to which the notification relates:

PART I – REGISTRANT INFORMATION

Rio Tinto plc
Full name of registrant

-
Former name if applicable

6 St James’s Square
Address of principal executive office (Street and number)

London, SW1Y 4LD, United Kingdom
City, state and zip code

PART II – RULE 12b-25 (b) AND (c)

If the subject report could not be filed without unreasonable effort or expense and the registrant seeks relief pursuant to Rule 12b-25(b), the following should be completed. (Check box if appropriate.)

	(a)	The reasons described in reasonable detail in Part III of this form could not be eliminated without unreasonable effort or expense;
	(b)	The subject annual report, semi-annual report, transition report on Form 10-K, Form 20-F, Form 11-K, Form N-SAR or Form N-CSR, or portion thereof, will be filed on or before the fifteenth calendar day following the prescribed due date; or the subject quarterly report or transition report on Form 10-Q, or portion thereof, will be filed on or before the fifth calendar day following the prescribed due date; and
	(c)	The accountant’s statement or other exhibit required by Rule 12b-25(c) has been attached if applicable.

PART III – NARRATIVE

State below in reasonable detail why Forms 10-K, 20-F, 11-K, 10-Q, N-SAR, N-CSR, or the transition report or portion thereof, could not be filed within the prescribed time period.

The Registrant is unable to file its Annual Report on Form 11-K because the audit of the financial statements for the U.S. Borax Inc. Thrift Plan for Salaried Employees required by the Registrant’s independent auditors was not completed and made available to the Registrant in time for the annual report to be filed in a timely manner. Due to the reason described above, the Registrant could not have timely filed the Form 11-K without unreasonable effort or expense, and the Form 11-K will be filed no later than the fifteenth calendar day following the prescribed due date.

PART IV – OTHER INFORMATION

(1)	Name and telephone number of person to contact in regard to this notification:

Alan Stuyvesant			801			252-3510
(Name)			(Area Code)			(Telephone number)

(2)	Have all other periodic reports required under Section 13 or 15(d) of the Securities Exchange Act of 1934 or Section 30 of the Investment Company Act of 1940 during the preceding 12 months or for such shorter period that the registrant was required to file such report(s) been filed? If the answer is no, identify report(s).
	Yes      No

(3)	Is it anticipated that any significant change in results of operations from the corresponding period for the last fiscal year will be reflected by the earnings statements to be included in the subject report or portion thereof?
	Yes      No

If so, attach an explanation of the anticipated change, both narratively and quantitatively, and, if appropriate, state the reasons why a reasonable estimate of the results cannot be made.

 

Rio Tinto plc
(Name of Registrant as Specified in Charter)

has caused this notification to be signed on its behalf by the undersigned thereunto duly authorized.

Date June 30, 2004	By	/s/ Alan Stuyvesant
	Name	Alan Stuyvesant
	Title	Secretary

 

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