Transaction in Own Shares

BP PLC
09 May 2005



BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 09 May 2005

BP p.l.c. announces that on 6 May 2005, it purchased 2,900,000 ordinary shares
at prices between 544.50 pence and 549.00 pence per share. The purchased shares
will all be held as Treasury shares.

Following the above purchase, BP p.l.c. holds 190,331,000 ordinary shares in
Treasury, and has 21,296,397,943 ordinary shares in issue (excluding Treasury
shares).

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



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