Holding(s) in Company

Tullow Oil PLC
19 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)   ( Not disclosed %) of issued Class    

7)   Number of shares/amount of stock disposed

      Not disclosed

8)   ( Not disclosed %) of issued Class  

9)   Class of security

      Ordinary shares of 10p each

10)  Date of transaction

      17 July 2002

11)  Date company informed

      18 July 2002

12)  Total holding following this notification

      No longer notifiable
               
13)  Total percentage holding of issued class following this notification

      No longer notifiable

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 ....19 July 2002...


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