Transaction in Own Shares

BP PLC
11 May 2007


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 11 May 2007

BP p.l.c. announces that on 10 May 2007, it purchased for cancellation 3,140,616
ordinary shares at prices between 559.0 pence and 563.5 pence per share.

Following the above transaction, BP p.l.c. holds 1,943,900,660 ordinary shares
in Treasury, and has 19,202,999,071 ordinary shares in issue (excluding Treasury
shares).

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



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