Transaction in Own Shares

BP PLC
21 December 2005


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 21 December 2005

BP p.l.c. announces that on 20 December 2005, it purchased 3,600,000 ordinary
shares at prices between 619.00 pence and 622.00 pence per share. The purchased
shares will all be held as Treasury shares.

Following the above transaction, BP p.l.c. holds 982,639,684 ordinary shares in
Treasury, and has 20,656,593,150 ordinary shares in issue (excluding Treasury
shares).

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



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