List of Participating Companies

• Agip (UK) Limited
• Amerada Hess Limited
• Amoco (U.K.) Exploration Company
• Arco British Limited
• British Gas Exploration and Production
• British Petroleum Operating Company Limited
• Brabant Petroleum Limited
• Chevron UK Limited
• Cieco UK Limited
• Conoco (U.K.) Limited
• Elf Enterprise Caledonia Limited
• Enterprise Oil plc
• Goal Petroleum plc
• Hardy Oil and Gas plc
• Kerr McGee Oil (U.K.) plc
• LASMO North Sea plc
• LL&E
• Marathon Oil U.K. Limited
• Mobil North Sea Limited
• Murphy Petroleum Limited
• Nippon Oil Exploration Limited
• Oryx UK Energy Company
• Phillips Petroleum Company United Kingdom Limited
• Ranger Oil (U.K.) Limited
• Shell UK Exploration and Production
• Sovereign Exploration Limited
• Statoil (UK) Limited
• Talisman Energy (UK) Limited
• Texaco North Sea UK
• Union Texas Petroleum Limited