LONDON, UNITED KINGDOM--(Marketwire - May 10, 2012) - Heritage Oil Plc (TSX:HOC)(LSE:HOIL), an independent upstream exploration and production company, currently has 21,715,918 Ordinary Shares block listed under its Share Option Scheme, Exchangeable Shares and Convertible Bonds.

In February 2012 the Convertible Bonds were repaid and as such 27,084,664 Ordinary Shares have been removed from the Company's existing block listing.

Heritage Oil Plc holds 34,532,442 Ordinary Shares in treasury, and has 255,215,588 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 9 May 2012 is 258,026,996.

The above figure (258,026,996) 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.

More information about the Company is available on the Company's website at [ www.heritageoilplc.com ].

Notes to Editors

• Heritage is listed on the Main Market of the London Stock Exchange and is a constituent of the FTSE 250 Index. The trading symbol is HOIL. Heritage has a further listing on the Toronto Stock Exchange (TSX:HOC).

• Heritage is an independent upstream exploration and production company engaged in the exploration for, and the development, production and acquisition of, oil and gas in its core areas of Africa, the Middle East and Russia.

• Heritage has an exploration, appraisal and development asset in the Kurdistan Region of Iraq, exploration assets in Malta, Tanzania, Mali, Pakistan, Libya and the Democratic Republic of Congo and a producing property in Russia.

• For further information please refer to our website, [ www.heritageoilplc.com ].