29 July 2011Heritage Oil Plc(“Heritage”)Heritage - Transactions in Own Shares

Heritage Oil Plc, an independent upstream exploration and production company, announces that on 28 July 2011 it purchased 319,100 Ordinary Shares to be held in treasury at 256.4832 pence per share (with a price range of 251.5 and 261.0 pence per share). Following this purchase, Heritage Oil Plc holds 26,266,594 Ordinary Shares in treasury, and has

263,481,436 Ordinary Shares in issue (excluding treasury shares) as well as 2,811,408 exchangeable shares of no par value of Heritage Oil Corporation each carrying one voting right in Heritage.

The total number of voting rights in Heritage, excluding treasury shares, as at 28 July 2011 is

266,292,844.

The above figure (266,292,844) may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, Heritage under the FSA's Disclosure and Transparency Rules.

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For further information please contact: Heritage Oil Plc

Tony Buckingham, CEO / Paul Atherton, CFO

+44 (0) 1534 835 400 info@heritageoilplc.com

Heritage Oil Plc – Investor Relations

Tanya Clarke

+44 (0) 20 7518 0838 tanya.clarke@heritageoilplc.com

Pelham Bell Pottinger – PR - Europe

Nick Lambert / Duncan Mayall

+44 (0) 20 7861 3936 / +44 (0) 20 7861 3888

NLambert@pelhambellpottinger.co.uk / DMayall@pelhambellpottinger.co.uk

CHF Investor Relations – Investor Relations - Canada

Cathy Hume / Jeanny So

+1 416 868 1079 x231 / x225 cathy@chfir.com / jeanny@chfir.com

Notes to Editors