Transaction in Own Shares

BP PLC
28 June 2005


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

BP p.l.c. announces that on 27 June 2005, it purchased 3,275,000 ordinary shares
at prices between 580.50 pence and 586.00 pence per share. The purchased shares
will all be held as Treasury shares.

Following the above purchase, BP p.l.c. holds 306,443,000 ordinary shares in
Treasury, and has 21,186,093,420 ordinary shares in issue (excluding Treasury
shares).

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



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