Offer Update

Tullow Oil PLC
28 May 2004

                                                                     28 May 2004



(Not for release, publication or distribution in or into the United States,
Canada Australia or Japan)



                                 TULLOW OIL PLC

                        OFFER FOR ENERGY AFRICA LIMITED

              OFFER DECLARED WHOLLY UNCONDITIONAL IN ALL RESPECTS

Further to the announcement on 27 May 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 11 June 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 acquire compulsorily
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 11 June 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.



                                    - ENDS -

Enquiries:
Tullow Oil plc                                                  020 7333 6800
Aidan Heavey                      Chief Executive
Tom Hickey                        Chief Financial Officer
Graham Martin                     General Counsel

ABN AMRO Corporate Finance Limited                              020 7678 8000
Richard Kent

Hoare Govett Limited                                            020 7678 8000
Andrew Foster

Davy Corporate Finance Ltd                                      [phone]
Hugh McCutcheon

Citigate Dewe Rogerson                                          020 7638 9571
Martin Jackson

Murray Consultants Limited                                      + 353 1 498 0300
Joe Murray

Each of ABN AMRO Corporate Finance Limited, Hoare Govett Limited and Davy
Corporate Finance Ltd are acting for Tullow Oil plc and no one else in
connection with the matters referred to above and will not be responsible to
anyone other than Tullow Oil plc for providing the protections afforded to
clients of ABN AMRO Corporate Finance Limited, Hoare Govett Limited and Davy
Corporate Finance Ltd (as the case may be) nor for providing advice in relation
to the matters referred to above.

This announcement does not constitute an offer to sell or the solicitation of an
offer to purchase or subscribe for any securities.

The Offer is not being made, directly or indirectly, in, into or from the United
States, Canada, Australia or Japan.


                      This information is provided by RNS
            The company news service from the London Stock Exchange          BGDURBDGGSR