News Release:

Further to the announcement made on 26 May 2011 in relation to the conditional acquisition of the Ghanaian interests of EO Group Limited for $305 million, Tullow Oil plc (Tullow) is pleased to announce that all of the conditions to the acquisition were satisfied and the acquisition completed today.

This acquisition, with an effective date of 1 December 2010, will increase Tullow’s interest in the West Cape Three Points licence offshore Ghana by 3.5% to 26.4% and increase the Group’s interest in the Jubilee field, which Tullow operates, by 1.75% to 36.5%.

Following the completion, 10,137,196 ordinary shares of 10p each in the capital of Tullow (Shares), are expected to be admitted on 26 July 2011 to the official list of the UK Listing Authority and the official list of the Irish Stock Exchange and to trading on the main markets of the London Stock Exchange and the Irish Stock Exchange. The shares satisfy approximately $216 million of the consideration and the balance, which includes certain working capital adjustments, has been paid in cash.

Following Admission, the total number of Shares in issue is 900,315,402, and the total number of voting rights in the Company is 900,315,402. The Company holds no Shares in treasury.

The above figure 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, the Company under the FSA’s Disclosure and Transparency Rules.

FOR FURTHER CORPORATE INFORMATION CONTACT:
Tullow Oil plc
(+44 20 3249 9000)
Chris Perry – Investor Relations
James Arnold – Investor Relations
George Cazenove – Media Relations

Citigate Dewe Rogerson
(+44 207 638 9571)
Martin Jackson
Kate Lehane

Murray Consultants
(+353 1 498 0300)
Joe Murray
Ed Micheau

Notes to Editors
Tullow is a leading independent oil & gas, exploration and production group, quoted on the London and Irish Stock Exchanges (symbol: TLW) and is a constituent of the FTSE 100 Index. The Group has interests in over 90 exploration and production licences across 22 countries and focuses on four core areas: Africa, Europe, South Asia and South America.

In Africa, Tullow has production in Ghana, Gabon, Côte d’Ivoire, Mauritania, Congo (Brazzaville) and Equatorial Guinea with two large appraisal and development programmes in Ghana and Uganda. Tullow also has exploration interests in Gabon, Côte d’Ivoire, Liberia, Sierra Leone, Mauritania, Senegal, Tanzania, Madagascar, Namibia, Kenya and Ethiopia.

Tullow’s European interests are focused on gas in the UK Southern North Sea and the Netherlands. In South Asia, Tullow has exploration and production in Bangladesh and exploration interests in Pakistan. In South America, Tullow has exploration interests in Guyana, French Guiana and Suriname.