Transaction in Own Shares

BP PLC
03 May 2007


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 3 May 2007

BP p.l.c. announces that on 2 May 2007, it purchased for cancellation 3,116,267
ordinary shares at prices between 556.0 pence and 568.0 pence per share.

BP p.l.c. also announces that on 2 May 2007 it transferred to participants in
its employee share schemes 1,275 ordinary shares at prices between 386.0 pence
and 500.0 pence. These shares were previously held as treasury shares.

Following the above transaction, BP p.l.c. holds 1,943,903,651 ordinary shares
in Treasury, and has 19,216,295,143 ordinary shares in issue (excluding Treasury
shares).

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



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