Transaction in Own Shares

BP PLC
30 September 2005


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 30 September 2005

BP p.l.c. announces that on 29 September 2005, it purchased 6,600,000 ordinary
shares at prices between 682.00 pence and 685.50 pence per share. The purchased
shares will all be held as Treasury shares.

Following the above purchase, BP p.l.c. holds 645,670,481 ordinary shares in
Treasury, and has 20,989,111,702 ordinary shares in issue (excluding Treasury
shares).

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



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