Management Change

Tullow Oil PLC 16 February 2006 News release Tullow Oil plc - Senior Management Changes 16 February 2006 - Tullow Oil plc (Tullow) announces the following forthcoming senior management changes. RETIREMENT OF ADRIAN NEL (63), EXPLORATION DIRECTOR Adrian Nel will retire as Exploration Director, and from the Board of Tullow, with effect from the conclusion of the Annual General Meeting on 31 May 2006. Adrian was appointed as Exploration Director and to the Board in September 2004 following the acquisition of Energy Africa. During his career, spanning over 30 years in the E&P business, Adrian has held a number of senior management positions including General Manager of Gencor's Oil and Gas Division, General Manager of Engen's Exploration Division and, from 1996 to 2004, Technical Director of Energy Africa. While with Energy Africa, Adrian built a very strong technical team and developed an extensive portfolio of exploration and development assets. These included some of the most prominent exploration discoveries and development projects in Africa, most notably the Ceiba field in Equatorial Guinea and the M'Boundi field in Congo (Brazzaville); today these fields represent 19% of Tullow's worldwide reserves. Since joining Tullow, Adrian has been instrumental in integrating and expanding the Group's exploration portfolio across all three core areas and has overseen a successful exploration programme, both in established hydrocarbon basins and in high impact frontier areas. APPOINTMENT OF ANGUS McCOSS (44), GENERAL MANAGER EXPLORATION Angus McCoss has been appointed to the new role of General Manager Exploration and will join the Group at the end of April. In this role, Angus will be responsible for the implementation of Tullow's exploration programmes, the continued growth and renewal of the Group's acreage portfolio and the ongoing development of Tullow's worldwide technical team. Angus has 19 years of wide-ranging exploration experience, working with Shell in Africa, Europe, South America and the Middle East. Angus has held a number of senior positions within Shell, most recently as the General Manager of Exploration in Nigeria, where he has been responsible for Shell's onshore, shelf and deep-water exploration throughout the country. Angus has a First Class Honours degree in Geology from the University of Dundee and a BP sponsored PhD in Structural Geology from the University of Belfast. Commenting today, Aidan Heavey, Chief Executive of Tullow said: 'Adrian has had a highly successful career in the E&P business and Tullow has been fortunate to benefit from his extensive knowledge and technical leadership. It has been a great pleasure to work with Adrian and I would like to thank him personally for his contribution to Tullow's exploration success and for his efforts to ensure a seamless integration of the Energy Africa exploration portfolio. We wish him well in the future. I am delighted to welcome Angus McCoss as the Group's head of exploration at an exciting time in Tullow's development. Angus brings a wealth of international exploration experience to the Group and we look forward to working with him as Tullow continues to grow.' If you have any questions on this announcement please contact: Tullow Oil plc Citigate Dewe Rogerson Murray Consultants (+44 20 8996 1000) (+44 207 638 9571) (+353 1 498 0300) Tom Hickey Martin Jackson Joe Murray Paul McDade 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 250 Index. The Group has interests in approximately 90 production and exploration licences in 16 countries and focuses on three core areas: NW Europe, West Africa and South Asia. Tullow's NW Europe interests are primarily focused on gas in the UK Southern North Sea where it has significant interests in the Caister-Murdoch System and the Thames/Hewett areas and operates over 60% of its production. In Africa, Tullow has production and exploration in Gabon, Cote d'Ivoire, Congo (Brazzaville) and Equatorial Guinea. Tullow also has exploration programmes in Morocco, Mauritania, Senegal, Cameroon, Uganda and Angola. In South Asia, Tullow has production and exploration interests in Pakistan, exploration and development activities in Bangladesh and exploration activities in India. For further information please refer to our website at www.tullowoil.com ENDS This information is provided by RNS The company news service from the London Stock Exchange

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