September 25, 2008 SECURITIES & EXCHANGE COMMISSION 450 Fifth Street, NW Washington, DC 20549 Attn.: Document Control RE: American Depositary Shares evidenced by One (1) American Depositary Receipts representing Ten (10) Ordinary Shares of Skyepharma Plc (Form F-6 File No333-13374) Ladies and Gentlemen: Pursuant to Rule 424(b)(3) under the Securities Act of 1933, as amended, on behalf of The Bank of New York Mellon, as Depositary for securities against which American Depositary Receipts are to be issued, we attach a copy of the new prospectus (Prospectus) reflecting the change in number of ordinary shares represented by one American Depositary Share (the Ratio). As required by Rule 424(e), the upper right hand corner of the Prospectus cover page has a reference to Rule 424(b)(3) and to the file number of the registration statement to which the Prospectus relates. Pursuant to Section III B of the General Instructions to the Form F-6 Registration Statement, the Prospectus consists of the ADR certificate with revised ratio for Skyepharma plc. The Prospectus has been revised to reflect the new ratio, and has been overstamped with: Effective October 2, 2008 the Companys American Depositary Share (ADS) Ratio Changed from 1:0 (One ADS Representing Ten Ordinary Shares) to 1:1 (One ADS Representing One Ordinary Share). Please contact me with any questions or comments at 212 815-2157 Stacy Haller The Bank of New York Mellon - ADR Division Encl. CC: Paul Dudek, Esq. (Office of International Corporate Finance) Depositary Receipts 101 Barclay Street 22nd Floor West, New York, NY 10286