Transaction in Own Shares

BP PLC
18 July 2005


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

BP p.l.c. announces that on 15 July 2005, it purchased 11,000,000 ordinary
shares at prices between 613.50 pence and 620.00 pence per share. The purchased
shares will all be held as Treasury shares.

Following the above purchase, BP p.l.c. holds 390,345,724 ordinary shares in
Treasury, and has 21,109,451,651 ordinary shares in issue (excluding Treasury
shares).

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



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