Blk Listing Six-Mnthly Return

Tullow Oil PLC 25 September 2000 Schedule 5 - Block Listing Six-Monthly Return 1 Name of company: Tullow Oil plc 2 Name of Scheme: Executive/Directors Share Option Schemes 3 Period of Return - From: 1/1/00 To: 30/06/00 4 Number and class of share(s) (amount of stock/debt security) not issued under scheme at the end of last period: 1,362,374 5 Number of shares issued/allotted under scheme during period: 85,334 6 Balance under scheme not yet issued/allotted under scheme at end of period: 1,277,040 7 Number and class of share(s) (amount of stock/debt securities) originally listed and the date of admission: 175,298,512 Ordinary @ IR10p each on 17 November 1994 Please confirm total number of shares in issue at the end of the period in order for us to update our records: 275,254,186 Contact name for queries: Tom Hickey Contact telephone number: +353 1 260 2611 Contact address: Airfield House Airfield Park Donnybrook Dublin 4 Name of person making return: Tom Hickey Position of person making return: Finance Director Schedule 5 - Block Listing Six-Monthly Return 1 Name of company: Tullow Oil plc 2 Name of Scheme: Executive/Directors Share Option Schemes 3 Period of Return - From: 1/7/99 To: 31/12/99 4 Number and class of share(s) (amount of stock/debt security) not issued under scheme at the end of last period: 1,852,374 5 Number of shares issued/allotted under scheme during period: 490,000 6 Balance under scheme not yet issued/allotted under scheme at end of period: 1,362,374 7 Number and class of share(s) (amount of stock/debt securities) originally listed and the date of admission: 175,298,512 Ordinary @ IR10p each on 17 November 1994 Please confirm total number of shares in issue at the end of the period in order for us to update our records: 275,168,852 Contact name for queries: Tom Hickey Contact telephone number: +353 1 260 2611 Contact address: Airfield House Airfield Park Donnybrook Dublin 4 Name of person making return: Tom Hickey Position of person making return: Finance Director Additional Information:

Companies

Tullow Oil (TLW)
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