| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AFFINITY WATER LIMITED | 02546950 | 01/02/2000 | 27/09/2001 | Amber |
| Bpwa Exhibition Management Co Ltd | 00968436 | 20/12/1991 | 28/01/1994 | Dissolved |
| British Public Works Association | 00304217 | 20/12/1991 | 28/01/1994 | Dissolved |
| DUTYBOUND LIMITED | 02896552 | 21/03/1994 | 31/03/1999 | Dissolved |
| FRESHWATER BIOLOGICAL ASSOCIATION(THE) | 00263162 | 30/09/1991 | 13/07/1995 | Silver |
| INSTITUTE OF WATER | 00539193 | 13/07/1991 | 07/05/1992 | Bronze |
| SUTTON AND EAST SURREY WATER PLC | 02447875 | 01/12/1995 | 31/03/2000 | Silver |
| VEOLIA WATER PROJECTS LIMITED | 02490118 | 06/04/1992 | 17/07/2000 | Gold |
| WATER COMPANIE'S ASSOCIATION(THE) | 00482134 | 20/08/1991 | 05/07/1995 | Dissolved |
| WRC P.L.C. | 02262098 | 24/09/1991 | 31/03/1999 | Dissolved |