Transaction in Own Shares

BP PLC
19 July 2005

BP p.l.c.  -  Transaction in Own Shares

BP p.l.c.  -  19 July 2005



BP p.l.c. announces that on 18 July 2005, it purchased 7,000,000 ordinary shares
at prices between 618.50 pence and 624.50 pence per share. The purchased shares
will all be held as Treasury shares.



Following the above purchase, BP p.l.c. holds  397,345,724 ordinary shares in
Treasury, and has  21,103,470,369 ordinary shares in issue (excluding Treasury
shares).



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


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