| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| National Grid Property Nominees (No 1) Ltd | 04147782 | 26/09/2008 | Dissolved |
| National Grid Property Nominees (No 2) Ltd | 04215950 | 26/09/2008 | Dissolved |
| National Grid Property Regeneration Ltd | 03990576 | 26/09/2008 | Dissolved |
| Sse Transco Ltd | 04150323 | 26/09/2008 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ASSETHALL LIMITED | 02326976 | 26/09/2008 | 19/11/2009 | Dissolved |
| BIRCH SITES LIMITED | 06404382 | 26/09/2008 | 19/11/2009 | Silver |
| BLACKWATER A LIMITED | 05046672 | 26/09/2008 | 19/11/2009 | Dissolved |
| BLACKWATER B LIMITED | 05046706 | 26/09/2008 | 19/11/2009 | Dissolved |
| BLACKWATER C LIMITED | 05046720 | 26/09/2008 | 19/11/2009 | Dissolved |
| BLACKWATER D LIMITED | 05046728 | 26/09/2008 | 19/11/2009 | Dissolved |
| BLACKWATER E LIMITED | 05046763 | 26/09/2008 | 19/11/2009 | Dissolved |
| BLACKWATER H LIMITED | 05167022 | 26/09/2008 | 19/11/2009 | Dissolved |
| BLACKWATER J LIMITED | 05167051 | 26/09/2008 | 19/11/2009 | Dissolved |
| BRITISH TRANSCO FINANCE (NO 3) LIMITED | 04292527 | 19/09/2008 | 19/11/2009 | Dissolved |
| BRITISH TRANSCO FINANCE (NO 5) LIMITED | 04394586 | 26/09/2008 | 19/11/2009 | Dissolved |
| GRIDCOM LIMITED | 04024441 | 26/09/2008 | 19/11/2009 | Dissolved |
| LANDRANCH LIMITED | 01390431 | 26/09/2008 | 19/11/2009 | Not Trading |
| LATTICE ENERGY SERVICES LIMITED | 03294522 | 26/09/2008 | 19/11/2009 | Dissolved |
| LATTICE GROUP INTERNATIONAL HOLDINGS LIMITED | 04103189 | 26/09/2008 | 19/11/2009 | Dissolved |
| MAINSTREAM FORTY-SEVEN LIMITED | 02460488 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID (SOUTHALL) GENERAL PARTNER LIMITED | 05123227 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID (SOUTHALL) LP LIMITED | 05123241 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID LAND AND PROPERTIES LIMITED | 02630510 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID LAND DEVELOPMENTS LIMITED | 02530995 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID LAND INVESTMENTS LIMITED | 02394159 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID PROPERTY (HIGH WYCOMBE) LIMITED | 06112614 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID PROPERTY (NORTHAMPTON) LIMITED | 05195302 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID PROPERTY (NORTHFLEET) LIMITED | 06548124 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID PROPERTY (TAUNTON) LIMITED | 06112616 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID PROPERTY (WARWICK) LIMITED | 05679150 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID PROPERTY DEVELOPMENTS LIMITED | 02630507 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID PROPERTY HOLDINGS LIMITED | 03797578 | 26/09/2008 | 19/11/2009 | Silver |
| NATIONAL GRID PROPERTY LIMITED | 02531489 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID THIRTY FIVE LIMITED | 05284987 | 26/09/2008 | 19/11/2009 | Dissolved |
| NATIONAL GRID TWENTY FOUR LIMITED | 07005281 | 01/09/2009 | 19/11/2009 | Dissolved |
| NG NOMINEES LIMITED | 02489329 | 26/09/2008 | 19/11/2009 | Not Trading |
| NGT TELECOM NO. 1 LIMITED | 03751494 | 26/09/2008 | 19/11/2009 | Dissolved |
| NGT TELECOM NO. 2 LIMITED | 04134417 | 30/09/2008 | 19/11/2009 | Dissolved |
| PORT GREENWICH LIMITED | 02392867 | 26/09/2008 | 19/11/2009 | Gold |
| THAMESPORT INTERCHANGE LIMITED | 06404380 | 26/09/2008 | 19/11/2009 | Gold |
| TRANSCO LIMITED | 04023840 | 26/09/2008 | 19/11/2009 | Dissolved |