Transaction in Own Shares

BP PLC
23 August 2007


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 23 August 2007

BP p.l.c. announces that on 22 August 2007, it purchased for cancellation
2,320,000 ordinary shares at prices between 539.0 pence and 546.0 pence per
share.

BP p.l.c. also announces that on 22 August 2007 it transferred to participants
in its employee share schemes 9,538 ordinary shares at prices between 350.0
pence and 500.0 pence. These shares were previously held as treasury shares.

Following the above transactions, BP p.l.c. holds 1,943,679,378 ordinary shares
in Treasury, and has 19,061,127,439 ordinary shares in issue (excluding Treasury
shares).

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



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