| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Fluxcontact Ltd | 02310110 | 28/05/1996 | Dissolved |
| Needroute Ltd | 02310205 | 28/05/1996 | Dissolved |
| Sabre Power Ltd | 03416322 | 17/11/1997 | Dissolved |
| Southern Electric Computer Services Ltd | 02317169 | 28/05/1996 | Dissolved |
| Southern Electric Distributors Ltd | 02310466 | 28/05/1996 | Dissolved |
| Southern Electric Estates Limited | 02310355 | 28/05/1996 | Dissolved |
| Southern Electric Europe Ltd | 03033185 | 05/04/1995 | Dissolved |
| Southern Electric Finance & Leasing Limited | 02317034 | 28/05/1996 | Dissolved |
| Southern Electric Holdings Ltd | 03033180 | 05/04/1995 | Dissolved |
| Southern Electric Training Services Limited | 02312402 | 28/05/1996 | Dissolved |
| Southern Electric Transport Services Limited | 02312397 | 28/05/1996 | Dissolved |
| Southern Energy Services Ltd | 02310498 | 28/05/1996 | Dissolved |
| Southern Environmental Services Ltd | 02310338 | 28/05/1996 | Dissolved |
| Southern Fuels Ltd | 02742784 | 28/05/1996 | Dissolved |
| Southern Heat & Power Ltd | 02742782 | 28/05/1996 | Dissolved |
| Southern Telecommunications Limited | 02794567 | 28/05/1996 | Dissolved |
| Startcover Limited | 02310382 | 28/05/1996 | Dissolved |
| Thermal Transfer (Midland) Ltd | SC099326 | 07/11/1997 | Dissolved |
| Thermal Transfer (North East) Ltd | SC099327 | 07/11/1997 | Dissolved |
| Thermal Transfer (South West) Ltd | SC099497 | 07/11/1997 | Dissolved |
| Thermal Transfer (U K) Ltd | SC099328 | 07/11/1997 | Dissolved |
| United Generating Ltd | 03033197 | 05/04/1995 | Dissolved |
| Westacott Ltd | 03196201 | 28/05/1996 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BOUYGUES E&S CONTRACTING UK LIMITED | SC087174 | 02/10/1997 | 30/08/1999 | One Red Flag |
| KEADBY CONSTRUCTION LIMITED | 02722985 | 08/10/1999 | 14/10/2002 | Dissolved |
| KEADBY DEVELOPMENTS LIMITED | 02691516 | 08/10/1999 | 14/10/2002 | Not Trading |
| KEADBY GENERATION LIMITED | 02729513 | 08/10/1999 | 14/10/2002 | Silver |
| KEADBY POWER LIMITED | 02548042 | 08/10/1999 | 14/10/2002 | Dissolved |
| NEOS NETWORKS LIMITED | SC213457 | 28/09/2001 | 14/10/2002 | Amber |
| S + S LIMITED | SC214382 | 19/03/2001 | 01/10/2002 | Dissolved |
| SCOTTISH AND SOUTHERN ENERGY POWER DISTRIBUTION LIMITED | SC213459 | 19/03/2001 | 01/10/2002 | Gold |
| SCOTTISH HYDRO ELECTRIC POWER DISTRIBUTION PLC | SC213460 | 19/03/2001 | 01/10/2002 | Silver |
| SCOTTISH HYDRO ELECTRIC TRANSMISSION PLC | SC213461 | 19/03/2001 | 01/10/2002 | Silver |
| SOUTHERN ELECTRIC POWER DISTRIBUTION PLC | 04094290 | 19/03/2001 | 01/10/2002 | Silver |
| SOUTHERN ELECTRICITY LIMITED | 02199285 | 28/05/1996 | 14/10/2002 | Dissolved |
| SSE CONTRACTING GROUP LIMITED | 02471438 | 02/10/1997 | 01/10/2002 | Amber |
| SSE ENERGY LIMITED | 02487475 | 08/10/1999 | 14/10/2002 | Dissolved |
| SSE ENERGY SUPPLY LIMITED | 03757502 | 07/08/2000 | 28/09/2001 | Bronze |
| SSE FINANCE LIMITED | SC181663 | 03/03/2000 | 14/10/2002 | Dissolved |
| SSE GENERATION LIMITED | 02310571 | 25/07/1995 | 28/09/2001 | Amber |
| SSE INVESTMENTS LIMITED | 02649366 | 12/04/1999 | 14/10/2002 | Dissolved |
| SSE LEASING LIMITED | SC165387 | 08/10/1999 | 14/10/2002 | Dissolved |
| SSE POWER LIMITED | 02372114 | 24/07/2002 | 14/10/2002 | Dissolved |
| SSE PRODUCTION SERVICES LIMITED | 02499702 | 08/10/1999 | 14/10/2002 | Silver |
| SSE RETAIL LIMITED | SC213458 | 28/09/2001 | 14/10/2002 | Gold |
| SSE SEABANK INVESTMENTS LIMITED | 02631512 | 08/10/1999 | 14/10/2002 | Bronze |
| SSE TRUSTEES LIMITED | 03048985 | 24/04/1995 | 14/10/2002 | Not Trading |
| SSE UTILITY SERVICES LIMITED | 01689416 | 02/10/1997 | 30/08/1999 | Not Trading |
| SSECOSEC (2) LIMITED | 02199206 | 28/05/1996 | 14/10/2002 | Dissolved |
| SWALEC GAS LIMITED | 02624695 | 07/08/2000 | 14/10/2002 | Dissolved |
| Se Energy Ltd | 02796288 | 08/10/1999 | 14/10/2002 | Dissolved |
| South Wales Energy Ltd | 03870373 | 07/08/2000 | 14/10/2002 | Dissolved |
| THERMAL TRANSFER (SCOTLAND) LIMITED | SC049263 | 02/10/1997 | 01/10/2002 | Dissolved |
| Thermal Transfer (Southern) Ltd | SC087951 | 02/10/1997 | 01/10/2002 | Dissolved |
| Thermal Transfer(Northern) Ltd | SC082994 | 02/10/1997 | 01/10/2002 | Dissolved |
| Uk Generating Ltd | 03033195 | 05/04/1995 | 14/10/2002 | Dissolved |
| Wales Electricity Ltd | 03870377 | 07/08/2000 | 14/10/2002 | Dissolved |
| Woolley Hall Ltd | 02265773 | 28/05/1996 | 14/10/2002 | Dissolved |