Transaction in Own Shares

BP PLC
21 August 2007


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 21 August 2007

BP p.l.c. announces that on 20 August 2007, it purchased for cancellation
1,840,000 ordinary shares at prices between 538.5 pence and 549.5 pence per
share.

Following the above transactions, BP p.l.c. holds 1,943,688,916 ordinary shares
in Treasury, and has 19,065,264,901 ordinary shares in issue (excluding Treasury
shares).


Enquiries: Fergus MacLeod, BP p.l.c. Tel: [phone]



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