Holding in Company

Tullow Oil PLC
23 December 2003

Tullow Oil Plc





23 December 2003



Re: Holding in Company





A letter from Merrill Lynch Investment Managers dated 19 December 2003, received
by Tullow Oil Plc on the 22 December 2003.













Companies Act 1985 ss 198-202 (as amended)





We are advised that for the purposes of the above provisions neither Merrill
Lynch Investment Managers Limited nor any of its affiliates in the Merrill Lynch
Investment Managers Limited, has a notifiable interest in the relevant share
capital of your company as of 18 December 2003.







Yours faithfully,

For MERRILL LYNCH INVESTMENT MANAGERS LIMITED











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                            the Irish Stock Exchange






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