Transaction in Own Shares

BP PLC
31 July 2007




BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 31 July 2007


BP p.l.c. announces that on 30 July 2007, it purchased for cancellation
2,150,000 ordinary shares at prices between 567.0 pence and 576.0 pence per
share.

Following the above transactions, BP p.l.c. holds 1,943,705,015 ordinary shares
in Treasury, and has 19,094,708,560 ordinary shares in issue (excluding Treasury
shares).

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



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