Transaction in Own Shares

BP PLC
15 March 2007


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 15 March 2007

BP p.l.c. announces that on 14 March 2007, it purchased for cancellation
6,008,000 ordinary shares at prices between 509.0 pence and 517.5 pence per
share and between 983.33 cents and 993.0 cents per share.

BP p.l.c. also announces that on 14 March 2007 it transferred to participants in
its employee share schemes 39,442 ordinary shares at prices between 326.0 pence
and 500.0 pence. These shares were previously held as treasury shares.

Following the above transaction, BP p.l.c. holds 1,943,979,574 ordinary shares
in Treasury, and has 19,318,862,317 ordinary shares in issue (excluding Treasury
shares).

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



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