Holding in Company

Tullow Oil PLC
10 December 2001


                                 SCHEDULE 10

                  NOTIFICATION OF MAJOR INTERESTS IN SHARES


1) Name of company
Tullow Oil Plc

2) Name of shareholder having a major interest

Schroders

3) Please state whether notification indicates that it is in respect of
holding of the shareholder named in 2 above or in respect of a
non-beneficial interest or in the case of an individual holder if it is a
holding of that person's spouse or children under the age of 18
Shareholder Above


4) Name of the registered holder(s) and, if more than one holder, the
number of shares held by each of them

11,838,755 Shares - Schroder Nominees

9,847,893 Shares - Schroder Unit Trusts Ltd

16,787,991 Shares - Nominee Accounts

5. Number of shares/amount of stock acquired
N/A

6) Percentage of issued class
N/A

7) Number of shares/amount of stock disposed
N/A

8) Percentage of issued class
N/A


9) Class of security

Stg 10p Ordinary Shares

10) Date of transaction
N/A

11) Date company informed

07/12/01

12. Total holding following this notification
    38,474,639
13. 13) Total percentage holding of issued class following this notification

    10.78%

    14) Any additional information
    N/A


    15) Name of contact and telephone number for queries
    Tom Hickey

Tel : [phone]

16) Name and signature of authorised company official responsible for
    making this notification

Tom Hickey


Date of notification ....10 December 2001.