Transaction in Own Shares

BP PLC
20 April 2007

BP p.l.c.  -  Transaction in Own Shares

BP p.l.c.  -  20 April 2007

BP p.l.c. announces that on 19 April 2007, it purchased for cancellation
3,512,410 ordinary shares at prices between 564.5 pence and 572.0 pence per
share.

Following the above transaction, BP p.l.c. holds 1,943,911,624 ordinary shares
in Treasury, and has 19,241,756,498 ordinary shares in issue (excluding Treasury
shares).

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


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