| AKER BP UK LIMITED | AKER BP ASA | 
| ALKANE ENERGY UK LIMITED | INFINIS ENERGY | 
| ALTA QUEST ENERGY CORPORATION (UK) LIMITED | BRITNRG LIMITED | 
| ALTWOOD PETROLEUM LIMITED | ALTWOOD PETROLEUM | 
| ANASURIA HIBISCUS UK LIMITED | HIBISCUS PETROLEUM | 
| ANGUS ENERGY WEALD BASIN NO.3 LIMITED | ANGUS ENERGY | 
| APACHE BERYL I LIMITED | APACHE CORPORATION | 
| APACHE NORTH SEA LIMITED | APACHE CORPORATION | 
| ARCO BRITISH LIMITED, LLC | BP EXPLORATION | 
| ATHENA EXPLORATION LIMITED | ATHENA EXPLORATION LIMITED | 
| AURORA ENERGY RESOURCES LIMITED | AURORA PETROLEUM | 
| BG GREAT BRITAIN LIMITED | SHELL PLC | 
| BG INTERNATIONAL LIMITED | SHELL PLC | 
| BLACKLAND PARK EXPLORATION LIMITED | BRITNRG LIMITED | 
| BOWLAND RESOURCES (NO.2) LIMITED | SPIRIT ENERGY | 
| BOWLAND RESOURCES LIMITED | SPIRIT ENERGY | 
| BP EXPLORATION (ALPHA) LIMITED | BP EXPLORATION | 
| BP EXPLORATION OPERATING COMPANY LIMITED | BP EXPLORATION | 
| BRIDGE PETROLEUM 1 LIMITED | BRIDGE PETROLEUM GROUP | 
| BRIDGE PETROLEUM 3 LIMITED | BRIDGE PETROLEUM GROUP | 
| BRIDGE PETROLEUM 5 LIMITED | BRIDGE PETROLEUM GROUP | 
| BRITOIL LIMITED | BP EXPLORATION | 
| BROCKHAM CAPITAL LIMITED | BROCKHAM CAPITAL LIMITED | 
| CALDERA PETROLEUM (UK) LTD | ABAN OFFSHORE | 
| CALENERGY GAS LIMITED | CALENERGY GAS (HOLDINGS) | 
| CALENERGY NORTH SEA LIMITED | CALENERGY GAS (HOLDINGS) | 
| CALENERGY RESOURCES (UK) LIMITED | CALENERGY GAS (HOLDINGS) | 
| CALENERGY SNS LIMITED | CALENERGY GAS (HOLDINGS) | 
| CENTRICA OFFSHORE UK LIMITED | CENTRICA STORAGE HOLDINGS | 
| CHEVRON BRITAIN LIMITED | CHEVRON CORPORATION | 
| CHRYSAOR (U.K.) SIGMA LIMITED | HARBOUR ENERGY PLC | 
| CHRYSAOR (U.K.) THETA LIMITED | HARBOUR ENERGY PLC | 
| CHRYSAOR DEVELOPMENTS LIMITED | HARBOUR ENERGY PLC | 
| CHRYSAOR LIMITED | HARBOUR ENERGY PLC | 
| CHRYSAOR NORTH SEA LIMITED | HARBOUR ENERGY PLC | 
| CHRYSAOR PETROLEUM COMPANY U.K. LIMITED | HARBOUR ENERGY PLC | 
| CHRYSAOR PETROLEUM LIMITED | HARBOUR ENERGY PLC | 
| CHRYSAOR PRODUCTION (U.K.) LIMITED | HARBOUR ENERGY PLC | 
| CHRYSAOR RESOURCES (IRISH SEA) LIMITED | HARBOUR ENERGY PLC | 
| CNOOC PETROLEUM EUROPE LIMITED | CNOOC INTERNATIONAL | 
| CNOOC PETROLEUM FARRAGON U.K. LIMITED | CNOOC INTERNATIONAL | 
| CNR INTERNATIONAL (U.K.) DEVELOPMENTS LIMITED | CNR INTERNATIONAL | 
| CNR INTERNATIONAL (U.K.) LIMITED | CNR INTERNATIONAL | 
| COMTRACK (UK) LIMITED | COMTRACK VENTURES | 
| CONOCOPHILLIPS (U.K.) HOLDINGS LIMITED | CONOCOPHILLIPS | 
| COURAGE ENERGY (U.K.) LIMITED | BRITNRG LIMITED | 
| CUADRILLA BALCOMBE LIMITED | CUADRILLA RESOURCES | 
| CUADRILLA BOWLAND LIMITED | CUADRILLA RESOURCES | 
| CUADRILLA ELSWICK (NO.2) LIMITED | CUADRILLA RESOURCES | 
| CUADRILLA ELSWICK LIMITED | CUADRILLA RESOURCES | 
| CUADRILLA NORTH CLEVELAND LIMITED | CUADRILLA RESOURCES | 
| DANA PETROLEUM (BVUK) LIMITED | DANA PETROLEUM LIMITED | 
| DANA PETROLEUM (E&P) LIMITED | DANA PETROLEUM LIMITED | 
| DART ENERGY (WEST ENGLAND) LIMITED | STAR ENERGY GROUP PLC | 
| DCARBONX LTD | DCARBONX LTD | 
| DELTIC ENERGY PLC | DELTIC ENERGY | 
| DESS ENERGY LIMITED | DESS EXPLORATION CONSULTING LIMITED | 
| DNO EXPLORATION UK LIMITED | DNO NORTH SEA | 
| DNO NORTH SEA (ROGB) LIMITED | DNO NORTH SEA | 
| DNO NORTH SEA (U.K.) LIMITED | DNO NORTH SEA | 
| E. F. OIL AND GAS LIMITED | TOTALENERGIES UPSTREAM UK LIMITED | 
| EGDON RESOURCES (AURORA) LIMITED | HEYCO ENERGY GROUP | 
| EGDON RESOURCES U.K. LIMITED | HEYCO ENERGY GROUP | 
| ELSWICK POWER LIMITED | A J LUCAS GROUP | 
| ENERGEAN UK LTD | ENERGEAN PLC | 
| ENI UK LIMITED | ENI UK LIMITED | 
| ENQUEST HEATHER LIMITED | ENQUEST PLC | 
| ENQUEST PROGRESS LIMITED | ENQUEST PLC | 
| ENTERPRISE OIL LIMITED | SHELL PLC | 
| ENTERPRISE OIL MIDDLE EAST LIMITED | SHELL PLC | 
| EQUINOR SPV LIMITED | EQUINOR ASA | 
| EQUINOR UK LIMITED | EQUINOR ASA | 
| EQUINOR WOS LIMITED | EQUINOR ASA | 
| ESSO EXPLORATION AND PRODUCTION UK LIMITED | EXXONMOBIL INTERNATIONAL | 
| EUROPA OIL & GAS LIMITED | EUROPA OIL AND GAS | 
| EVERARD ENERGY LIMITED | EVERARD ENERGY | 
| EXXONMOBIL SNS LIMITED | EXXONMOBIL INTERNATIONAL | 
| FINDER ENERGY UK LIMITED | FINDER ENERGY PTY | 
| GAZPROM INTERNATIONAL UK LTD. | GAZPROM INTERNATIONAL | 
| HARTSHEAD RESOURCES LTD | HARTSHEAD RESOURCES LTD | 
| HARVESTER ENERGY (UK) LIMITED | HARVESTER ENERGY (UK) LIMITED | 
| HARWORTH POWER (GENERATION) LIMITED | VELOX POWER | 
| HIS GRACE THE DUKE OF DEVONSHIRE | THE CHATSWORTH ESTATES COMPANY | 
| HORIZON ENERGY ACQUISITION LIMITED | HORIZON ENERGY PARTNERS | 
| HORIZON ENERGY PARTNERS LIMITED | HORIZON ENERGY PARTNERS | 
| HORSE HILL DEVELOPMENTS LTD | UK OIL & GAS PLC | 
| HUMBLY GROVE ENERGY LIMITED | EP UK INVESTMENTS | 
| HUTTON ENERGY UK LIMITED | HUTTON ENERGY LIMITED | 
| IGAS ENERGY ENTERPRISE LIMITED | STAR ENERGY GROUP PLC | 
| IGAS ENERGY PRODUCTION LIMITED | STAR ENERGY GROUP PLC | 
| INEOS CLIPPER SOUTH C LIMITED | INEOS INDUSTRIES | 
| INEOS E&P (UK) LIMITED | INEOS INDUSTRIES | 
| INEOS FPS LIMITED | INEOS INDUSTRIES | 
| INEOS UPSTREAM LIMITED | INEOS INDUSTRIES | 
| IRANIAN OIL COMPANY (U.K.) LIMITED | FCM TRUST | 
| ISLAND GAS LIMITED | STAR ENERGY GROUP PLC | 
| ITHACA (NE) E&P LIMITED | ITHACA ENERGY | 
| ITHACA EF LIMITED | ITHACA ENERGY | 
| ITHACA ENERGY (UK) LIMITED | ITHACA ENERGY | 
| ITHACA EPSILON LIMITED | ITHACA ENERGY | 
| ITHACA GAMMA LIMITED | ITHACA ENERGY | 
| ITHACA GSA LIMITED | ITHACA ENERGY | 
| ITHACA J E&P LIMITED | ITHACA ENERGY | 
| ITHACA MA LIMITED | ITHACA ENERGY | 
| ITHACA OIL AND GAS LIMITED | ITHACA ENERGY | 
| ITHACA SP E&P LIMITED | ITHACA ENERGY | 
| ITHACA SP O&G LIMITED | ITHACA ENERGY | 
| ITHACA UKCS LIMITED | ITHACA ENERGY | 
| ITHACA ZETA LIMITED | ITHACA ENERGY | 
| JERSEY PETROLEUM LTD | JERSEY OIL AND GAS PLC | 
| JERSEY V&C LTD | JERSEY OIL AND GAS PLC | 
| KISTOS ENERGY LIMITED | KISTOS PLC | 
| LUCAS BOLNEY LIMITED | A J LUCAS GROUP | 
| LUCAS BOWLAND (NO.2) LIMITED | A J LUCAS GROUP | 
| LUCAS BOWLAND (UK) LIMITED | A J LUCAS GROUP | 
| MCX DUNLIN (UK) LIMITED | MITSUBISHI CORPORATION | 
| MCX OSPREY (UK) LIMITED | MITSUBISHI CORPORATION | 
| MONTROSE INDUSTRIES LIMITED | MONTROSE INDUSTRIES | 
| NEO ENERGY (PRODUCTION) LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY (ZEX) LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY ALPHA LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY BETA LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY CENTRAL NORTH SEA LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY DELTA LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY EXPLORATION UK LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY GT LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY LNS LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY NATURAL RESOURCES LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY NORTH SEA LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY OIL TRADING LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY PETROLEUM LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY PRODUCTION UK LIMITED | NEO NEXT ENERGY | 
| NEO ENERGY RESOURCES UK LIMITED | NEO NEXT ENERGY | 
| NOBEL OIL E&P NORTH SEA LIMITED | NOBEL UPSTREAM | 
| NOBLE ENERGY (OILEX) LIMITED | CHEVRON CORPORATION | 
| NORTH SEA NATURAL RESOURCES LTD | NORTH SEA NATURAL RESOURCES | 
| ONE-DYAS E&P LIMITED | ONE-DYAS | 
| ONE-DYAS UK LIMITED | ONE-DYAS | 
| ONEGAS WEST LIMITED | SHELL PLC | 
| ONSHORE PRODUCTION SERVICES LIMITED | ONSHORE OILFIELD SERVICES LIMITED | 
| ORCADIAN ENERGY (CNS) LTD | ORCADIAN ENERGY | 
| PAINTED WOLF RESOURCES LIMITED | PAINTED WOLF RESOURCES | 
| PERENCO GAS (UK) LIMITED | PERENCO OIL & GAS | 
| PERENCO NORTH SEA LIMITED | PERENCO OIL & GAS | 
| PERENCO UK LIMITED | PERENCO OIL & GAS | 
| PETRICHOR ENERGY UK LIMITED | HEYCO ENERGY GROUP | 
| PETROGAS NORTH SEA LIMITED | PETROGAS INTERNATIONAL | 
| PING PETROLEUM UK PLC | PING PETROLEUM LIMITED | 
| PRAX HURRICANE (WHIRLWIND) LIMITED | PRAX GROUP | 
| PRAX HURRICANE GLA LIMITED | PRAX GROUP | 
| PRAX HURRICANE GWA LIMITED | PRAX GROUP | 
| PREMIER OIL E&P UK EU LIMITED | HARBOUR ENERGY PLC | 
| PREMIER OIL E&P UK LIMITED | HARBOUR ENERGY PLC | 
| PREMIER OIL UK LIMITED | HARBOUR ENERGY PLC | 
| RAPID OIL PRODUCTION LTD | RAPID OIL PRODUCTION | 
| RATHLIN ENERGY (UK) LIMITED | RATHLIN ENERGY | 
| REABOLD RESOURCES PLC | REABOLD RESOURCES | 
| REABOLD SOUTHERN NORTH SEA LIMITED | REABOLD RESOURCES | 
| REGENT PARK ENERGY LIMITED | INFINIS ENERGY | 
| RIGEL PETROLEUM (NI) LIMITED | NEO NEXT ENERGY | 
| RIGEL PETROLEUM UK LIMITED | NEO NEXT ENERGY | 
| RIGON EXPLORATION LIMITED | RIGON ENERGY | 
| RIGON OPERATIONS LIMITED | RIGON ENERGY | 
| ROCKROSE (UKCS2) LIMITED | ROCKROSE ENERGY | 
| ROCKROSE (UKCS3) LIMITED | ROCKROSE ENERGY | 
| ROCKROSE UKCS 10 LIMITED | ROCKROSE ENERGY | 
| ROCKROSE UKCS4 LIMITED | ROCKROSE ENERGY | 
| SALTFLEETBY ENERGY LIMITED | ANGUS ENERGY | 
| SCOTTISHPOWER ENERGY MANAGEMENT LIMITED | SCOTTISH POWER UK PLC | 
| SERICA ENERGY (UK) LIMITED | SERICA ENERGY | 
| SERICA ENERGY CHINOOK LIMITED | SERICA ENERGY | 
| SERICA ENERGY MISTRAL LIMITED | SERICA ENERGY | 
| SERICA ENERGY NORTE LIMITED | SERICA ENERGY | 
| SEVEN STAR NATURAL GAS LIMITED | INFINIS ENERGY | 
| SHELL CLAIR UK LIMITED | SHELL PLC | 
| SHELL EP OFFSHORE VENTURES LIMITED | SHELL PLC | 
| SHELL U.K. LIMITED | SHELL PLC | 
| SHELL U.K. NORTH ATLANTIC LIMITED | SHELL PLC | 
| SHELL UPSTREAM OVERSEAS SERVICES (I) LIMITED | SHELL PLC | 
| SOJITZ ENERGY DEVELOPMENT LIMITED | SOJITZ CORPORATION | 
| SOLITON RESOURCES LIMITED | SOLITON RESOURCES LIMITED | 
| SOUTH WESTERN ENERGY LIMITED | SOUTH WESTERN ENERGY LIMITED | 
| SPIRIT ENERGY NORTH SEA LIMITED | SPIRIT ENERGY | 
| SPIRIT ENERGY NORTH SEA OIL LIMITED | SPIRIT ENERGY | 
| SPIRIT ENERGY PRODUCTION UK LIMITED | SPIRIT ENERGY | 
| SPIRIT ENERGY RESOURCES LIMITED | SPIRIT ENERGY | 
| SPIRIT ENERGY SOUTHERN NORTH SEA LIMITED | SPIRIT ENERGY | 
| SPIRIT NORTH SEA GAS LIMITED | SPIRIT ENERGY | 
| STELINMATVIC INDUSTRIES LTD | STELINMATVIC INDUSTRIES | 
| TAQA BRATANI LIMITED | TAQA EUROPA B.V. | 
| TAQA BRATANI LNS LIMITED | TAQA EUROPA B.V. | 
| TERRAIN ENERGY LIMITED | TERRAIN ENERGY | 
| TETRA ENERGY UK ONSHORE LTD | TETRA ENERGIES | 
| TOTALENERGIES E&P INTERNATIONAL K1 LIMITED | TOTALENERGIES UPSTREAM UK LIMITED | 
| TOTALENERGIES E&P INTERNATIONAL K2 LIMITED | TOTALENERGIES UPSTREAM UK LIMITED | 
| TOTALENERGIES E&P INTERNATIONAL K3 LIMITED | TOTALENERGIES UPSTREAM UK LIMITED | 
| TOTALENERGIES E&P NORTH SEA UK LIMITED | TOTALENERGIES UPSTREAM UK LIMITED | 
| TOTALENERGIES E&P UK LIMITED | TOTALENERGIES UPSTREAM UK LIMITED | 
| TOTALENERGIES OFFSHORE UK LIMITED | TOTALENERGIES UPSTREAM UK LIMITED | 
| TRANSWORLD PETROLEUM (U.K.) LIMITED | NEO NEXT ENERGY | 
| TRIANGLE ENERGY (UK) PTY LTD | TRIANGLE ENERGY GLOBAL | 
| TULLOW OIL SK LIMITED | TULLOW UK | 
| UK NORTH SEA LIMITED | SHELL PLC | 
| UKOG (137/246) LTD | UK OIL & GAS PLC | 
| UKOG (GB) LIMITED | UK OIL & GAS PLC | 
| UNION JACK OIL PLC | UNION JACK OIL PLC | 
| UOG PL090 LIMITED | UNITED OIL & GAS PLC | 
| WALDORF CNS (I) LIMITED | WALDORF PRODUCTION | 
| WALDORF CNS (II) LIMITED | WALDORF PRODUCTION | 
| WALDORF OPERATIONS LIMITED | WALDORF PRODUCTION | 
| WALDORF PETROLEUM RESOURCES LIMITED | WALDORF PRODUCTION | 
| WALDORF PRODUCTION UK PLC | WALDORF PRODUCTION | 
| WINTERSHALL NOORDZEE B.V. | WINTERSHALL NOORDZEE |