Re: Schedule 5

Tullow Oil PLC
05 November 2004

                                   SCHEDULE 5

                        BLOCKLISTING SIX MONTHLY RETURN



1. Name of company



Tullow Oil plc


2. Name of schemes



Tullow Oil 1988 Executive Share Option Scheme ('1988 scheme')

Tullow Oil 1998 Executive Share option Scheme ('1998 scheme')



3. Period of return:



From  5 May 2004            To      4 November 2004


4. Number and class of shares(s)
   (amount of stock/debt security)
   not issued under schemes



2,134,470 ordinary shares of 10p each


5. Number of shares issued/allotted
   under schemes during period



372,833 - 1988 Scheme

852,692 - 1998 Scheme


6. Balance under schemes not yet issued/allotted
   at end of period



727,167  - 1988 Scheme

181,778  - 1998 Scheme


7. Number and class of share(s)
   (amount of stock/debt securities)
   originally listed and the date of admission



2,200,000 Ordinary shares of 10p each admitted on 5 November 2003



Please confirm total number of shares in issue at the end of the period
in order for us to update our records



643,702,862

Contact for queries:    Richard Taylor



Address:    Tullow Oil plc

5th Floor

30 Old Burlington Street

London W1S 3AR

Telephone: [phone]





Person making the return: Richard Taylor



Position:   Assistant Secretary






                                   SCHEDULE 5

                        BLOCKLISTING SIX MONTHLY RETURN



1. Name of company



Tullow Oil plc


2. Name of schemes



Tullow Oil 2000 Executive Share Option Scheme

3. Period of return:



From  9 June 2004           To      4 November 2004



4. Number and class of shares(s)
   (amount of stock/debt security)
   not issued under schemes



1,700,000 ordinary shares of 10p each


5. Number of shares issued/allotted
   under schemes during period



1,648,000



6. Balance under schemes not yet issued/allotted
   at end of period



52,000

7. Number and class of share(s)
   (amount of stock/debt securities)
   originally listed and the date of admission



1,700,000 Ordinary shares of 10p each admitted on 9 June 2004



Please confirm total number of shares in issue at the end of the period
in order for us to update our records



643,702,862

Contact for queries:    Richard Taylor



Address:    Tullow Oil plc

5th Floor

30 Old Burlington Street

London W1S 3AR

Telephone: [phone]



Person making the return: Richard Taylor

Position:   Assistant Secretary








                                   SCHEDULE 5

                        BLOCKLISTING SIX MONTHLY RETURN



1. Name of company



Tullow Oil plc


2. Name of schemes



Tullow Oil 1988 Executive Share Option Scheme ('1988 scheme')

Tullow Oil 1998 Executive Share option Scheme ('1998 scheme')

Tullow Oil 2000 Executive Share option Scheme ('2000 scheme')

3. Period of return:



From  11 October 2004            To       4 November 2004


4. Number and class of shares(s)
   (amount of stock/debt security)
   not issued under schemes



5,000,000 ordinary shares of 10p each


5. Number of shares issued/allotted
   under schemes during period



NIL


6. Balance under schemes not yet issued/allotted
   at end of period



1,500,000  - 1988 Scheme

1,500,000  - 1998 Scheme

2,000,000  - 2000 Scheme


7. Number and class of share(s)
   (amount of stock/debt securities)
   originally listed and the date of admission



5,000,000 Ordinary shares of 10p each admitted on 11 October 2004



Please confirm total number of shares in issue at the end of the period
in order for us to update our records



643,702,862

Contact for queries:    Richard Taylor



Address:    Tullow Oil plc

5th Floor

30 Old Burlington Street

London W1S 3AR

Telephone: [phone]





Person making the return: Richard Taylor



Position:   Assistant Secretary








This announcement has been issued through the Companies Announcement Service of

                           the Irish Stock Exchange.






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