Transaction in Own Shares

BP PLC
01 June 2005


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 1 June 2005

BP p.l.c. announces that on 31 May 2005, it purchased 3,950,000 ordinary shares
at prices between 551.00 pence and 561.00 pence per share. The purchased shares
will all be held as Treasury shares.

Following the above purchase, BP p.l.c. holds 242,608,000 ordinary shares in
Treasury, and has 21,245,192,665 ordinary shares in issue (excluding Treasury
shares).

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



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