Transaction in Own Shares

BP PLC
22 August 2005

BP p.l.c.  -  Transaction in Own Shares
BP p.l.c.  -  22 August 2005

BP p.l.c. announces that on 19 August 2005, it purchased 6,246,200 ordinary
shares at prices between 625.00 pence and 634.00 pence per share and between
1132.50 cents and 1136.33 cents per share. The purchased shares will all be held
as Treasury shares.

Following the above purchase, BP p.l.c. holds 582,346,881 ordinary shares in
Treasury, and has 20,933,074,053 ordinary shares in issue (excluding Treasury
shares).

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


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