NAME
| | JURISDICTION OF
INCORPORATION OR
ORGANIZATION
|
|---|
| 99.999 LIMITED | | ENGLAND AND WALES |
| ADVANTICA CORPORATE VENTURES LIMITED | | ENGLAND AND WALES |
| ADVANTICA LIMITED | | ENGLAND AND WALES |
| ADVANTICA PTY LIMITED | | AUSTRALIA |
| ADVANTICA, INC. | | DELAWARE |
| AEMC, L.L.C. | | DELAWARE |
| AERIAL GROUP LIMITED | | ENGLAND AND WALES |
| AERIAL UK LIMITED | | ENGLAND AND WALES |
| AGL SYSTEMS INTERNATIONAL LIMITED | | ENGLAND AND WALES |
| AMPLE DESIGN LIMITED | | ENGLAND AND WALES |
| ARBUCKLE ACRES, INC | | NEW YORK |
| ARTERION LIMITED | | ENGLAND AND WALES |
| ASSETHALL LIMITED | | ENGLAND AND WALES |
| ATLANTIC WESTERN CONSULTING, INC. | | MASSACHUSETTS |
| BASSLINK PTY LIMITED | | AUSTRALIA |
| BEEGAS NOMINEES LIMITED | | ENGLAND AND WALES |
| BLACKWATER 1 LIMITED | | UNITED KINGDOM |
| BLACKWATER 2 LIMITED | | UNITED KINGDOM |
| BLACKWATER 3 LIMITED | | UNITED KINGDOM |
| BLACKWATER 4 LIMITED | | UNITED KINGDOM |
| BLACKWATER 5 LIMITED | | UNITED KINGDOM |
| BLACKWATER A LIMITED | | UNITED KINGDOM |
| BLACKWATER AGENCY LIMITED | | ENGLAND AND WALES |
| BLACKWATER B LIMITED | | UNITED KINGDOM |
| BLACKWATER C LIMITED | | UNITED KINGDOM |
| BLACKWATER D LIMITED | | UNITED KINGDOM |
| BLACKWATER E LIMITED | | UNITED KINGDOM |
| BLACKWATER F LIMITED | | ENGLAND AND WALES |
| BLACKWATER G LIMITED | | UNITED KINGDOM |
| BLACKWATER H LIMITED | | UNITED KINGDOM |
| BLACKWATER J LIMITED | | ENGLAND AND WALES |
| BLACKWATER SC 1 LIMITED | | SCOTLAND |
| BLACKWATER SC A LIMITED | | SCOTLAND |
| BRITISH TRANSCO CAPITAL, INC. | | DELAWARE |
| BRITISH TRANSCO FINANCE (NO 1) LIMITED | | CAYMAN ISLANDS |
| BRITISH TRANSCO FINANCE (NO 2) LIMITED | | CAYMAN ISLANDS |
| BRITISH TRANSCO FINANCE (NO 3) LIMITED | | ENGLAND AND WALES |
| BRITISH TRANSCO FINANCE (NO 5) LIMITED | | ENGLAND AND WALES |
| BRITISH TRANSCO FINANCE, INC. | | DELAWARE |
| BRITISH TRANSCO INTERNATIONAL FINANCE BV | | NETHERLANDS |
| BSC CO LIMITED | | ENGLAND AND WALES |
| COGSYS LIMITED | | ENGLAND AND WALES |
| CONTIGUOUS LIMITED | | ENGLAND AND WALES |
| CROWN CASTLE COMMUNICATIONS LIMITED | | ENGLAND AND WALES |
| CROWN CASTLE UK FINANCE PLC | | ENGLAND AND WALES |
| CROWN CASTLE UK HOLDINGS LIMITED | | ENGLAND AND WALES |
| | | |
| CROWN CASTLE UK LIMITED | | ENGLAND AND WALES |
| CROWN CASTLE UK PENSION TRUST LIMITED | | ENGLAND AND WALES |
| EASTLANDS (BENEFITS ADMINISTRATION) LIMITED | | ENGLAND AND WALES |
| EASTLANDS LIMITED | | ENGLAND AND WALES |
| ELECTRACOM LIMITED | | ENGLAND AND WALES |
| ELEXON LIMITED | | ENGLAND AND WALES |
| ENERGI LIMITED | | ENGLAND AND WALES |
| ENERGIS POLSKA SP. Z O.O. | | POLAND |
| ENERGIS SERVICES LIMITED | | ENGLAND AND WALES |
| ENERGY MARKET OPERATIONS LIMITED | | ENGLAND AND WALES |
| ENERGY SETTLEMENTS AND INFORMATION SERVICES LIMITED | | ENGLAND AND WALES |
| EUA BIOTEN, INC. | | MASSACHUSETTS |
| EUA ENERGY INVESTMENT CORPORATION | | MASSACHUSETTS |
| EUA/FRCII ENERGY ASSOCIATES | | UNITED STATES |
| FASTNET CALOOSAHATCHEE COMMUNICATIONS LIMITED | | BRITISH VIRGIN ISLANDS |
| FULCRUM CONNECTIONS (EMPLOYERS) LIMITED | | ENGLAND AND WALES |
| FULCRUM CONNECTIONS LIMITED | | ENGLAND AND WALES |
| GAS RESEARCH & TECHNOLOGY CENTRE LIMITED | | ENGLAND AND WALES |
| GEMSTONE SOFTWARE LIMITED | | ENGLAND AND WALES |
| GRAIN LNG LIMITED | | ENGLAND AND WALES |
| GRANITE STATE ELECTRIC COMPANY | | NEW HAMPSHIRE |
| GRID INTERNATIONAL LIMITED | | ENGLAND AND WALES |
| GRID INVESTMENT HOLDINGS LIMITED | | ENGLAND AND WALES |
| GRID ONE LIMITED | | ENGLAND AND WALES |
| GRIDAMERICA HOLDINGS INC. | | UNITED STATES |
| GRIDAMERICA LLC | | UNITED STATES |
| GRIDCOM (UK) LIMITED | | ENGLAND AND WALES |
| GRIDCOM AERIAL SITES PLC | | ENGLAND AND WALES |
| GRIDCOM LIMITED | | ENGLAND AND WALES |
| GRIDMET LIMITED | | ENGLAND AND WALES |
| GRIDNAT LIMITED | | ENGLAND AND WALES |
| GRTC LIMITED | | ENGLAND AND WALES |
| HUDSON POINTE, INC | | NEW YORK |
| INFRASTRUCTURE TECHNOLOGY GROUP LIMITED | | ENGLAND AND WALES |
| INTERNATIONAL POWER SYSTEMS LIMITED | | ENGLAND AND WALES |
| IPS LIMITED | | ENGLAND AND WALES |
| ITG LIMITED | | ENGLAND AND WALES |
| LAND MANAGEMENT AND DEVELOPMENT, INC | | NEW YORK |
| LANDRANCH LIMITED | | ENGLAND AND WALES |
| LANDWEST, INC | | NEW YORK |
| LATTICE ENERGY SERVICES LIMITED | | ENGLAND AND WALES |
| LATTICE GROUP EMPLOYEE BENEFIT TRUST LIMITED | | ENGLAND AND WALES |
| LATTICE GROUP HOLDINGS LIMITED | | ENGLAND AND WALES |
| LATTICE GROUP INTERNATIONAL HOLDINGS LIMITED | | ENGLAND AND WALES |
| LATTICE GROUP PLC | | ENGLAND AND WALES |
| LATTICE GROUP SERVICES LIMITED | | ENGLAND AND WALES |
| LATTICE GROUP TRUSTEES LIMITED | | ENGLAND AND WALES |
| LATTICE GROUP US HOLDINGS, INC. | | DELAWARE |
| LATTICE INTELLECTUAL PROPERTY LIMITED | | ENGLAND AND WALES |
| | | |
| LATTICE LIMITED | | ENGLAND AND WALES |
| LATTICE OPSCO LIMITED | | ENGLAND AND WALES |
| LATTICE TELECOM FINANCE (NO 1) LIMITED | | ISLE OF MAN |
| LATTICE TELECOMMUNICATIONS ASSET DEVELOPMENT COMPANY LIMITED | | ENGLAND AND WALES |
| LOUGHBOROUGH PARK MANAGEMENT LIMITED | | ENGLAND AND WALES |
| MAINSTREAM FORTY-SEVEN LIMITED | | ENGLAND AND WALES |
| MASSACHUSETTS ELECTRIC COMPANY | | MASSACHUSETTS |
| MELMAR LIMITED | | ISLE OF MAN |
| MERCATOR DEVELOPMENTS LIMITED | | UNITED KINGDOM |
| METROWEST REALTY LLC | | DELAWARE |
| MOREAU PARK, INC | | NEW YORK |
| NANTUCKET ELECTRIC COMPANY | | MASSACHUSETTS |
| NATGRID FINANCE HOLDINGS LIMITED | | ENGLAND AND WALES |
| NATGRID FINANCE LIMITED | | ENGLAND AND WALES |
| NATGRID HOLDINGS LIMITED | | ENGLAND AND WALES |
| NATGRID INVESTMENTS LIMITED | | ENGLAND AND WALES |
| NATGRID LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID (IOM) UK LTD | | ENGLAND AND WALES |
| NATIONAL GRID (IRELAND) 1 LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID (IRELAND) 2 LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID (US) HOLDINGS LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID (US) INVESTMENTS | | ENGLAND AND WALES |
| NATIONAL GRID (US) INVESTMENTS 2 | | ENGLAND AND WALES |
| NATIONAL GRID (US) INVESTMENTS 3 | | ENGLAND AND WALES |
| NATIONAL GRID (US) INVESTMENTS 4 | | ENGLAND AND WALES |
| NATIONAL GRID (US) INVESTMENTS 5 | | ENGLAND AND WALES |
| NATIONAL GRID (US) INVESTMENTS 6 | | ENGLAND AND WALES |
| NATIONAL GRID (US) PARTNER 1 LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID (US) PARTNER 2 LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID ADVANTICA LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID AUSTRALIA PTY LIMITED | | CAYMAN ISLANDS |
| NATIONAL GRID BASSLINK LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID BRAZIL B.V. | | NETHERLANDS |
| NATIONAL GRID BRAZIL FINANCE | | ENGLAND AND WALES |
| NATIONAL GRID BRAZIL TRANSMISSION B.V. | | NETHERLANDS |
| NATIONAL GRID CHILE B.V. | | NETHERLANDS |
| NATIONAL GRID COMMUNICATIONS HOLDINGS, INC. | | MASSACHUSETTS |
| NATIONAL GRID COMMUNICATIONS, INC. | | MASSACHUSETTS |
| NATIONAL GRID COMPANY HOLDINGS LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID COMPANY PLC | | ENGLAND AND WALES |
| NATIONAL GRID CONNECTIONS LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID DISTRIBUTION LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID EIGHT LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID EIGHTEEN LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID ELECTRICITY LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID ELECTRICITY TRANSMISSION LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID ELEVEN LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID FIFTEEN LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID FINANCE B.V. | | NETHERLANDS |
| NATIONAL GRID FIVE LIMITED | | ENGLAND AND WALES |
| | | |
| NATIONAL GRID FOUR LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID FOURTEEN LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID GAS LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID GENERAL PARTNERSHIP | | DELAWARE |
| NATIONAL GRID GOLD LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID GROUP LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID HOLDINGS B.V. | | NETHERLANDS |
| NATIONAL GRID HOLDINGS INC. | | DELAWARE |
| NATIONAL GRID HOLDINGS LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID HOLDINGS ONE PLC | | ENGLAND AND WALES |
| NATIONAL GRID HOLLAND LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID INDIA B.V. | | NETHERLANDS |
| NATIONAL GRID INDUS B.V. | | ENGLAND AND WALES |
| NATIONAL GRID INTERNATIONAL LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID IRELAND THREE | | MALTA |
| NATIONAL GRID JERSEY HOLDINGS FIVE LIMITED | | JERSEY |
| NATIONAL GRID JERSEY HOLDINGS THREE LIMITED | | JERSEY |
| NATIONAL GRID JERSEY INVESTMENTS LIMITED | | ENGLAND |
| NATIONAL GRID JERSEY INVESTMENTS TWO LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID LNG LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID MANQUEHUE B.V. | | NETHERLANDS |
| NATIONAL GRID MARKET SERVICES LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID METERING LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID MIDDLE EAST FZCO | | UNITED ARAB EMIRATES |
| NATIONAL GRID NETHERLANDS ONE BV | | NETHERLANDS |
| NATIONAL GRID NETHERLANDS THREE BV | | NETHERLANDS |
| NATIONAL GRID NETHERLANDS TWO BV | | NETHERLANDS |
| NATIONAL GRID NINE LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID NINETEEN LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID ONE LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID OVERSEAS LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID OVERSEAS TWO LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID PENSIONS LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID POLAND B.V. | | NETHERLANDS |
| NATIONAL GRID PROCUREMENT BV | | NETHERLANDS |
| NATIONAL GRID PROPERTIES LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID PROPERTY LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID SEVEN LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID SEVENTEEN LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID SIX LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID SIXTEEN LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID TEN | | ENGLAND AND WALES |
| NATIONAL GRID THREE LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID TRANSCO EUROPE LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID TRANSCO GROUP LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID TRANSCO HOLDINGS LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID TRANSCO INTERNATIONAL LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID TRANSCO ONE LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID TRANSCO PLC | | ENGLAND AND WALES |
| NATIONAL GRID TRANSCO UK LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID TRANSMISSION LIMITED | | ENGLAND AND WALES |
| | | |
| NATIONAL GRID TRANSMISSION SERVICES CORPORATION | | MASSACHUSETTS |
| NATIONAL GRID TWELVE LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID TWENTY LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID TWENTY ONE LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID TWO LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID US 6 LLC | | UNITED STATES |
| NATIONAL GRID US LLC | | DELAWARE |
| NATIONAL GRID USA | | DELAWARE |
| NATIONAL GRID USA SERVICE COMPANY, INC. | | MASSACHUSETTS |
| NATIONAL GRID WIRELESS LIMITED | | ENGLAND AND WALES |
| NATIONAL GRID ZAMBIA B.V. | | NETHERLANDS |
| NATIONAL GRID ZAMBIA LIMITED | | ENGLAND AND WALES |
| NEES COMMUNICATIONS, INC. | | MASSACHUSETTS |
| NEES ENERGY, INC. | | MASSACHUSETTS |
| NEES TELECOMMUNICATIONS CORP. | | MASSACHUSETTS |
| NETMAP LIMITED | | ENGLAND AND WALES |
| NETWORK MAPPING LIMITED | | ENGLAND AND WALES |
| NEW ENGLAND ELECTRIC TRANSMISSION CORPORATION | | NEW HAMPSHIRE |
| NEW ENGLAND ENERGY INCORPORATED | | MASSACHUSETTS |
| NEW ENGLAND HYDRO FINANCE COMPANY, INC. | | MASSACHUSETTS |
| NEW ENGLAND HYDRO-TRANSMISSION CORPORATION | | NEW HAMPSHIRE |
| NEW ENGLAND HYDRO-TRANSMISSION ELECTRIC COMPANY, INC. | | MASSACHUSETTS |
| NEW ENGLAND POWER COMPANY | | MASSACHUSETTS |
| NEW ENGLAND WHOLESALE ELECTRIC COMPANY | | MASSACHUSETTS |
| NEWHC, INC. | | MASSACHUSETTS |
| NG AUSTRALIA GP PTY LTD | | AUSTRALIA |
| NG AUSTRALIA LLP | | AUSTRALIA |
| NG CHICAGO I LLC | | DELAWARE |
| NG CHICAGO II, LLC | | DELAWARE |
| NG JERSEY LIMITED | | JERSEY |
| NG MALTA ONE LIMITED | | ENGLAND AND WALES |
| NG PROCUREMENT HOLDINGS LIMITED | | ENGLAND AND WALES |
| NG PROPERTY DEVELOPMENTS LIMITED | | ENGLAND AND WALES |
| NGC (GB) LIMITED | | ENGLAND AND WALES |
| NGC DO BRASIL PARTICIPACOES LTDA | | BRAZIL |
| NGC EMPLOYEE SHARES TRUSTEE LIMITED | | ENGLAND AND WALES |
| NGC ENERGY LIMITED | | ENGLAND AND WALES |
| NGC INDUS LIMITED | | ENGLAND AND WALES |
| NGC IT LIMITED | | ENGLAND AND WALES |
| NGC LEASING LIMITED | | ENGLAND AND WALES |
| NGC LEISURE LIMITED | | ENGLAND AND WALES |
| NGC TWO LIMITED | | ENGLAND AND WALES |
| NGC ZAMBIA LIMITED | | ENGLAND AND WALES |
| NGG (DELAWARE) LLC | | DELAWARE |
| NGG FINANCE (NO 1) LIMITED | | ENGLAND AND WALES |
| NGG FINANCE PLC | | ENGLAND AND WALES |
| NGG LIMITED | | ENGLAND AND WALES |
| NGG TELECOMS HOLDINGS LIMITED | | ENGLAND AND WALES |
| | | |
| NGG TELECOMS INVESTMENT LIMITED | | ENGLAND AND WALES |
| NGG TELECOMS LIMITED | | ENGLAND AND WALES |
| NGT CONNECTIONS (NO 1) LIMITED | | ENGLAND AND WALES |
| NGT CONNECTIONS (NO 2) LIMITED | | ENGLAND AND WALES |
| NGT FIVE LIMITED | | ENGLAND AND WALES |
| NGT FOUR LIMITED | | ENGLAND AND WALES |
| NGT HOLDING COMPANY (ISLE OF MAN) LIMITED | | ISLE OF MAN |
| NGT HOLDINGS LIMITED | | ENGLAND AND WALES |
| NGT INSURANCE COMPANY (GUERNSEY) LIMITED | | ISLE OF MAN |
| NGT INSURANCE COMPANY (IRELAND) LIMITED | | IRELAND |
| NGT INSURANCE COMPANY (ISLE OF MAN) LIMITED | | ISLE OF MAN |
| NGT INTELLECTUAL PROPERTY LIMITED | | ENGLAND AND WALES |
| NGT INTERCONNECTORS LIMITED | | ENGLAND AND WALES |
| NGT LUXEMBOURG ONE LIMITED | | ENGLAND & WALES |
| NGT LUXEMBOURG TWO LIMITED | | ENGLAND & WALES |
| NGT METERING LIMITED | | ENGLAND AND WALES |
| NGT NOMINEES LIMITED | | ENGLAND AND WALES |
| NGT ONE LIMITED | | ENGLAND AND WALES |
| NGT ONSTREAM LIMITED | | ENGLAND AND WALES |
| NGT TELECOM NO.1 LIMITED | | ENGLAND AND WALES |
| NGT TELECOM NO.2 LIMITED | | ENGLAND AND WALES |
| NGT THREE LIMITED | | UNITED KINGDOM |
| NGT TWO LIMITED | | ENGLAND AND WALES |
| NGT UK HOLDINGS LIMITED | | ENGLAND AND WALES |
| NGT UK LIMITED | | ENGLAND AND WALES |
| NGTM HOLDINGS LIMITED | | UNITED KINGDOM |
| NIAGARA MOHAWK HOLDINGS, INC. | | NEW YORK |
| NIAGARA MOHAWK POWER CORPORATION | | NEW YORK |
| NM PROPERTIES, INC. | | NEW YORK |
| NM RECEIVABLES CORP. II | | NEW YORK |
| NM RECEIVABLES, LLC | | NEW YORK |
| NM URANIUM, INC. | | TEXAS |
| NT LIMITED | | ENGLAND AND WALES |
| ON STREAM ASSET MANAGEMENT SERVICES LIMITED | | ENGLAND AND WALES |
| ON STREAM DATA MANAGEMENT LIMITED | | ENGLAND AND WALES |
| ON STREAM DATA PROVISION LIMITED | | ENGLAND AND WALES |
| ON STREAM METER OPERATIONS LIMITED | | ENGLAND AND WALES |
| ON STREAM METER READING SERVICES LIMITED | | ENGLAND AND WALES |
| ON STREAM METERING LIMITED | | ENGLAND AND WALES |
| ON STREAM SERVICES LIMITED | | ENGLAND AND WALES |
| ON STREAM SOLUTIONS LIMITED | | ENGLAND AND WALES |
| ON STREAM UTILITIES LIMITED | | ENGLAND AND WALES |
| ON STREAM.COM LIMITED | | ENGLAND AND WALES |
| ONSTREAM METERING SERVICES LIMITED | | ENGLAND AND WALES |
| OPINAC ENERGY CORPORATION | | CANADA |
| OPINAC NORTH AMERICA, INC. | | DELAWARE |
| OPROPCO, INC | | NEW YORK |
| PORT GREENWICH LIMITED | | ENGLAND AND WALES |
| POWERCOM LIMITED | | ENGLAND AND WALES |
| RISX ENVIRONMENTAL MANAGEMENT LIMITED | | SCOTLAND |
| RISX LIMITED | | SCOTLAND |
| | | |
| RIVERVIEW, INC | | NEW YORK |
| RT MASTS LIMITED | | ENGLAND AND WALES |
| SALMON SHORES, INC | | NEW YORK |
| SECONDSITE (SOUTHALL) GENERAL PARTNER LIMITED | | UNITED KINGDOM |
| SECONDSITE (SOUTHALL) LP LIMITED | | UNITED KINGDOM |
| SECONDSITE ESTATES LIMITED | | ENGLAND AND WALES |
| SECONDSITE HOLDINGS LIMITED | | ENGLAND AND WALES |
| SECONDSITE LAND DEVELOPMENTS LIMITED | | ENGLAND AND WALES |
| SECONDSITE LAND INVESTMENTS LIMITED | | ENGLAND AND WALES |
| SECONDSITE PORTFOLIO SOLUTIONS LIMITED | | ENGLAND AND WALES |
| SECONDSITE PROPERTY (NORTHAMPTON) LIMITED | | UNITED KINGDOM |
| SECONDSITE PROPERTY HOLDINGS LIMITED | | ENGLAND AND WALES |
| SECONDSITE PROPERTY LIMITED | | ENGLAND AND WALES |
| SECONDSITE PROPERTY NOMINEES (NO 1) LIMITED | | ENGLAND AND WALES |
| SECONDSITE PROPERTY NOMINEES (NO 2) LIMITED | | ENGLAND AND WALES |
| SECONDSITE PROPERTY PORTFOLIO LIMITED | | ENGLAND AND WALES |
| SECONDSITE REGENERATION LIMITED | | ENGLAND AND WALES |
| SSE TRANSCO LIMITED | | ENGLAND AND WALES |
| SST GMBH | | GERMANY |
| SST TOWERS COMMUNICATIONS SAS | | FRANCE |
| STARGAS NOMINEES LIMITED | | ENGLAND AND WALES |
| STC INTERNATIONAL HOLDINGS LIMITED | | ENGLAND AND WALES |
| STONER ASSOCIATES EUROPE LIMITED | | ENGLAND AND WALES |
| SUPERGRID ENERGY TRANSMISSION LIMITED | | ENGLAND AND WALES |
| SUPERGRID LIMITED | | ENGLAND AND WALES |
| TELDATA INTERNATIONAL LIMITED | | ENGLAND AND WALES |
| TELDATA SERVICES LIMITED | | ENGLAND AND WALES |
| TELDATA SOLUTIONS LIMITED | | ENGLAND AND WALES |
| TELECOM ELECTRIC LIMITED | | ENGLAND AND WALES |
| TELECOM INTERNATIONAL HOLDINGS LIMITED | | ENGLAND AND WALES |
| TELINK LIMITED | | ENGLAND AND WALES |
| TERRACOM DESIGN & DEVELOPMENT LIMITED | | ENGLAND AND WALES |
| TERRACOM ESTATES LIMITED | | ENGLAND AND WALES |
| THE ELECTRICITY TRANSMISSION COMPANY LIMITED | | ENGLAND AND WALES |
| THE NARRAGANSETT ELECTRIC COMPANY | | RHODE ISLAND |
| THE NATIONAL GRID GROUP QUEST TRUSTEE COMPANY LIMITED | | ENGLAND AND WALES |
| THE NATIONAL GRID INVESTMENTS COMPANY | | ENGLAND AND WALES |
| TOREN CV | | NETHERLANDS |
| TRANSCO (EMPLOYERS) LTD | | ENGLAND AND WALES |
| TRANSCO ASSET MAINTENANCE (SCOTLAND) LIMITED | | ENGLAND AND WALES |
| TRANSCO ASSET MAINTENANCE (WALES) LIMITED | | ENGLAND AND WALES |
| TRANSCO ASSET MAINTENANCE LIMITED | | ENGLAND AND WALES |
| TRANSCO ASSET MANAGEMENT (SCOTLAND) LIMITED | | ENGLAND AND WALES |
| TRANSCO ASSET MANAGEMENT (WALES) LIMITED | | ENGLAND AND WALES |
| TRANSCO ASSET MANAGEMENT LIMITED | | ENGLAND AND WALES |
| TRANSCO CONNECTIONS (SCOTLAND) LIMITED | | ENGLAND AND WALES |
| TRANSCO CONNECTIONS (WALES) LIMITED | | ENGLAND AND WALES |
| TRANSCO CONNECTIONS LIMITED | | ENGLAND AND WALES |
| TRANSCO EMERGENCY SERVICES (SCOTLAND) LIMITED | | ENGLAND AND WALES |
| TRANSCO EMERGENCY SERVICES (WALES) LIMITED | | ENGLAND AND WALES |
| | | |
| TRANSCO EMERGENCY SERVICES LIMITED | | ENGLAND AND WALES |
| TRANSCO HOLDINGS (EMPLOYERS) LTD | | ENGLAND AND WALES |
| TRANSCO HOLDINGS PLC | | ENGLAND AND WALES |
| TRANSCO LNG STORAGE LIMITED | | ENGLAND AND WALES |
| TRANSCO METERING SERVICES (SCOTLAND) LIMITED | | ENGLAND AND WALES |
| TRANSCO METERING SERVICES LIMITED | | ENGLAND AND WALES |
| TRANSCO PIPELINE CONSTRUCTORS (SCOTLAND) LIMITED | | ENGLAND AND WALES |
| TRANSCO PIPELINE CONSTRUCTORS (WALES) LIMITED | | ENGLAND AND WALES |
| TRANSCO PIPELINE CONSTRUCTORS LIMITED | | ENGLAND AND WALES |
| TRANSCO PIPELINES (SCOTLAND) LIMITED | | ENGLAND AND WALES |
| TRANSCO PIPELINES (WALES) LIMITED | | ENGLAND AND WALES |
| TRANSCO PIPELINES LIMITED | | ENGLAND AND WALES |
| TRANSCO PLC | | ENGLAND AND WALES |
| TRANSCO TELECOMMUNICATIONS ASSET DEVELOPMENT COMPANY LIMITED | | ENGLAND AND WALES |
| TRANSCO TRANSPORTATION COMPANY LIMITED | | ENGLAND AND WALES |
| TRANSGRID LIMITED | | ENGLAND AND WALES |
| TRISCAPE PLANNING LIMITED | | ENGLAND AND WALES |
| UPPER HUDSON DEVELOPMENT INC | | NEW YORK |
| UTILITY METERING SERVICES LIMITED | | ENGLAND AND WALES |
| VESAS LIMITED | | ENGLAND AND WALES |
| WAYFINDER GROUP, INC. | | MASSACHUSETTS |
| XOSERVE (UK) LIMITED | | ENGLAND AND WALES |
| XOSERVE HOLDINGS LIMITED | | ENGLAND AND WALES |
| XOSERVE LIMITED | | UNITED KINGDOM |
