Transaction in Own Shares

BP PLC
18 October 2007


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

BP p.l.c. announces that on 17 October 2007, it purchased for cancellation
3,250,000 ordinary shares at prices between 616.00 pence and 625.00 pence per
share.

BP p.l.c. also announces that on 17 October 2007 it transferred to participants
in its employee share schemes 32,206 ordinary shares at prices between 350.00
pence and 500.00 pence. These shares were previously held as treasury shares.

Following the above transactions BP p.l.c. holds 1,941,569,882 ordinary shares
in Treasury, and has 19,008,626,405 ordinary shares in issue (excluding Treasury
shares).

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



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