BP (BP)

Issuer: BP Capital Markets p.l.c.

Title: 1.55% Guaranteed Notes due 2011.

Total principal amount being issued: $750,000,000.

Issuance date: August 11, 2009.

Maturity date: August 11, 2011.

Day count: 30/360.

Day count convention: Following.

Interest rate: 1.55% per annum.

Date interest starts accruing: August 11, 2009.

Interest payment dates: Each February 11 and August 11.

First interest due date: February 11, 2010.

Regular record dates for interest: The 15^th calendar day preceding each interest payment date, whether or not such day is a business day.

Further issuances: BP Capital U.K. may, at its sole option, at any time and without the consent of the then existing note holders issue additional 2011 notes in one or more transactions subsequent to the date of this prospectus supplement with terms (other than the issuance date, issue price and, possibly, the first interest payment date and the date interest starts accruing) identical to the 2011 notes issued hereby. These additional 2011 notes will be deemed part of the same series as the 2011 notes issued hereby and will provide the holders of these additional 2011 notes the right to vote together with holders of the 2011 notes issued hereby, provided that such additional notes will be issued with no more than de minimis original issue discount or be part of a “qualified reopening” for U.S. federal income tax purposes.

Net proceeds: The net proceeds, before expenses, will be $748,575,000.