Holding(s) in Company

Tullow Oil PLC
23 June 2004


                 Tullow Oil plc ('Tullow Oil' or 'the Company')

                                           Holding in Company


Tullow Oil was notified on 22 June 2004 that Wellington Management Company, LLP
no longer has a notifiable interest in the share capital of the Company.


ENQUIRIES

Tom Hickey
Tullow Oil plc
Tel: + 44 (0) 20 7333 6800

23 June, 2004



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