Transaction in Own Shares

BP PLC
18 July 2007


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 18 July 2007

BP p.l.c. announces that on 17 July 2007, it purchased for cancellation
2,500,000 ordinary shares at prices between 602.0 pence and 606.5 pence per
share.

Following the above transaction, BP p.l.c. holds 1,943,732,522 ordinary shares
in Treasury, and has 19,112,415,694 ordinary shares in issue (excluding Treasury
shares).

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



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