Offer for Energy Africa Declared Unconditional

Further to the announcement on May 27, 2004 in connection with the Offer for the entire issued share capital of Energy Africa Limited ("Energy Africa"), the board of Tullow Oil plc ("Tullow) announces that Admission of the Placing Shares took place at 8.00 a.m. today and that the Offer is declared wholly unconditional in all respects and will remain open for acceptance for a further 14 days until June 11, 2004.

As a result, Tullow intends to invoke the provisions of S440K of the Companies Act, 1973 (Act 61. Of 1973) as amended, of South Africa, to compulsorily acquire the remaining Energy Africa Shares. Should S440K be invoked, and consequently Tullow acquires the shares of all the Energy Africa Shareholders in accordance with S440K, Energy Africa will apply to the JSE Securities Exchange to be delisted. Energy Africa will also apply for the delisting of the Global Depositary Shares from the Luxembourg Stock Exchange.

Energy Africa Shareholders who have not yet accepted the Offer are, therefore, encouraged to complete the Form of Acceptance enclosed with the Offer Document and return it, together with supporting documents, to the transfer secretaries to the Offer, Computershare Investor Services 2004 (Proprietary) Limited, at PO Box 61051, Marshalltown 2107, South Africa as soon as possible and, in any event, before June 11, 2004.

Terms used in this announcement shall have the same meaning as in the Listing Particulars dated 4 May 2004 which were sent to Tullow Shareholders and Energy Africa Shareholders.

The Listing Particulars and Circular posted to Tullow Shareholders are available for inspection at the UK Listing Authority's Document Viewing Facility, which is situated at: Financial Services Authority, 25 The North Colonnade, Canary Wharf, London E14 5HS.