Transaction in Own Shares

BP PLC
18 March 2005


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 18 March 2005

BP p.l.c. announces that on 17 March 2005, it purchased 3,700,000 ordinary
shares at prices between 558.00 pence and 564.00 pence per share. The purchased
shares will all be held as Treasury shares.

Following the above purchase, BP p.l.c. holds 100,850,000 ordinary shares in
Treasury, and has 21,380,917,839 ordinary shares in issue (excluding Treasury
shares).

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



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