Transaction in Own Shares

BP PLC
19 March 2007


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 19 March 2007

BP p.l.c. announces that on 16 March 2007, it purchased for cancellation
3,000,000 ordinary shares at prices between 509.0 pence and 514.0 pence per
share.

Following the above transaction, BP p.l.c. holds 1,943,979,574 ordinary shares
in Treasury, and has 19,312,244,435 ordinary shares in issue (excluding Treasury
shares).

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



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