| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ANITE LIMITED | 01798114 | 28/11/1992 | 17/04/1998 | Silver |
| BUILDING RESEARCH ESTABLISHMENT LIMITED | 03319324 | 21/05/1997 | 17/04/1998 | Amber |
| E.ON UK PLC | 02366970 | 24/11/1993 | 17/04/1998 | Gold |
| HORNBY PLC | 01547390 | 01/01/1997 | 17/04/1998 | Silver |
| INTERNATIONAL PROCESS TECHNOLOGIES LIMITED | 03139509 | 25/03/1997 | 17/04/1998 | Dissolved |
| KENNET PROPERTIES LIMITED | 02498997 | 03/05/1992 | 31/03/1996 | One Red Flag |
| PCI MEMBRANE SYSTEMS LIMITED | 00315984 | 23/07/1992 | 31/03/1996 | Dissolved |
| PWT PROJECTS LIMITED | 00090710 | 01/08/1994 | 31/03/1996 | Not Trading |
| THAMES (DITTON) MARINA LIMITED | 00578460 | 13/10/1992 | 31/03/1996 | Not Trading |
| THAMES WATER DEVELOPMENTS LIMITED | 02638323 | 15/08/1992 | 31/03/1996 | Dissolved |
| THAMES WATER DRAINAGE SERVICES LIMITED | 02435863 | 25/10/1992 | 16/06/1995 | Dissolved |
| THAMES WATER ENVIRONMENTAL SERVICES LIMITED | 02334443 | 23/07/1992 | 31/03/1996 | Dissolved |
| THAMES WATER INTERNATIONAL SERVICES HOLDINGS LIMITED | 01920229 | 29/04/1991 | 31/03/1996 | Dissolved |
| THAMES WATER INTERNATIONAL SERVICES LIMITED | 01939768 | 29/04/1991 | 31/03/1996 | Dissolved |
| THAMES WATER INVESTMENTS LIMITED | 02567126 | 10/12/1992 | 31/03/1996 | Silver |
| THAMES WATER LIMITED | 02366623 | 02/08/1992 | 31/03/1996 | Bronze |
| THAMES WATER NOMINEES LIMITED | 02614522 | 14/06/1991 | 21/03/1996 | Dissolved |
| THAMES WATER OVERSEAS CONSULTANCY LIMITED | 00757959 | 24/08/1995 | 31/03/1996 | Dissolved |
| THAMES WATER OVERSEAS LIMITED | 02909020 | 16/03/1994 | 31/03/1996 | Amber |
| THAMES WATER PROPERTY SERVICES LIMITED | 02606112 | 30/04/1991 | 31/03/1996 | One Red Flag |
| THAMES WATER SHARE SCHEME TRUSTEES LIMITED | 02403843 | 27/01/1993 | 21/03/1996 | Dissolved |
| THAMES WATER UTILITIES FINANCE PLC | 02403744 | 02/10/1992 | 31/03/1996 | Silver |
| THAMES WATER UTILITIES LIMITED | 02366661 | 24/07/1992 | 31/03/1996 | Amber |
| The Water Services Association of England & Wales | 01710723 | 01/07/1994 | 04/01/1996 | Dissolved |
| UTILITIES AND SERVICE INDUSTRIES TRAINING LIMITED | 01741451 | 30/11/1991 | 22/03/1996 | Dissolved |
| WATERAID | 01787329 | 28/07/1993 | 25/03/1996 | Silver |