Holding(s) in Company

Tullow Oil PLC
16 July 2002



                  DEALINGS BY SUBSTANTIAL SHAREHOLDERS


1)   NAME OF COMPANY

     TULLOW OIL PLC

2)   NAME OF SHAREHOLDER HAVING A MAJOR INTEREST

     MORGAN STANLEY SECURITIES LIMITED

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

     SEE 2 ABOVE

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

     MORGAN STANLEY SECURITIES LIMITED

5)   Number of shares/amount of stock acquired.

     NOT DISCLOSED

6)   (%) of issued Class

     NOT DISCLOSED

7)   Number of shares/amount of stock disposed

     NOT DISCLOSED

8)   (%) of issued Class

     NOT DISCLOSED

9)   Class of security

     ORDINARY SHARES OF 10p EACH

10)  Date of transaction

     11 JULY 2002

11)  Date company informed

     15 JULY 2002

12)  Total holding following this notification

     16,750,000
               
13)  Total percentage holding of issued class following this notification

     4.66%

14)  Any additional information

     N/A

15)  Name of contact and telephone number for queries

     TOM HICKEY, 020 7333 6843

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

     Date of Notification ....16 JULY 2002....................



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