Transaction in Own Shares

BP PLC
29 September 2005

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

BP p.l.c.  -  29 September 2005



BP p.l.c. announces that on 28 September 2005, it purchased 5,100,000 ordinary
shares at prices between 673.75 pence and 678.00 pence per share. The purchased
shares will all be held as Treasury shares.



Following the above purchase, BP p.l.c. holds 639,070,481 ordinary shares in
Treasury, and has 20,995,553,386  ordinary shares in issue (excluding Treasury
shares).



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


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