Transaction in Own Shares

BP PLC
28 April 2005


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 28 April 2005

BP p.l.c. announces that on 27 April 2005, it purchased 3,900,000 ordinary
shares at prices between 531.50 pence and 542.00 pence per share. The purchased
shares will all be held as Treasury shares.

Following the above purchase, BP p.l.c. holds 171,181,000 ordinary shares in
Treasury, and has 21,314,588,960 ordinary shares in issue (excluding Treasury
shares).

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



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