Transaction in Own Shares

BP PLC
28 July 2005

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

BP p.l.c. announces that on 27 July 2005, it purchased 9,282,000 ordinary shares
at prices between 627.50 pence and 632.50 pence per share and between 1098.00
cents and 1107.17 cents per share. The purchased shares will all be held as
Treasury shares.

Following the above purchase, BP p.l.c. holds 459,297,724 ordinary shares in
Treasury, and has 21,042,157,156 ordinary shares in issue (excluding Treasury
shares).

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


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