| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALPHEUS ENVIRONMENTAL LIMITED | 02499491 | 21/10/1992 | 14/01/1997 | One Red Flag |
| ANGLIAN WATER BUSINESS (NATIONAL) LIMITED | 03017251 | 19/10/1998 | 01/02/2002 | Bronze |
| ANGLIAN WATER INTERNATIONAL HOLDINGS LIMITED | 02024769 | 31/12/1997 | 01/02/2002 | Silver |
| ANGLIAN WATER INTERNATIONAL LIMITED | 02729389 | 31/12/1997 | 01/02/2002 | Silver |
| ANGLIAN WATER SERVICES FINANCING PLC | 04330322 | 09/01/2002 | 26/04/2005 | Silver |
| ANGLIAN WATER SERVICES HOLDINGS LIMITED | 04330144 | 09/01/2002 | 26/04/2005 | Gold |
| ANGLIAN WATER SERVICES LIMITED | 02366656 | 19/01/1998 | 26/04/2005 | Bronze |
| AWG GROUP LIMITED | 02366618 | 19/01/1998 | 26/04/2005 | Bronze |
| AWG PARENT CO LIMITED | 03936645 | 30/05/2000 | 26/04/2005 | Amber |
| AWG SHELF 11 LIMITED | SC115080 | 29/05/2001 | 01/02/2002 | Bronze |
| Anglian Water International (U K) Ltd | 02986238 | 31/12/1997 | 01/02/2002 | Dissolved |
| EP REALISATIONS LIMITED | 01678349 | 20/01/1999 | 02/03/2000 | One Red Flag |
| Grafham | 02379543 | 18/04/1997 | 31/03/1998 | Dissolved |
| H2GO LIMITED | 03957413 | 03/07/2000 | 09/04/2001 | Dissolved |
| INSTITUTE OF WATER | 00539193 | 20/05/2004 | 05/03/2005 | Bronze |
| MORRISON LIMITED | 04700725 | 18/03/2003 | 14/01/2004 | Silver |
| The Water Services Association of England & Wales | 01710723 | 15/10/1998 | 27/03/2001 | Dissolved |
| UTILITIES AND SERVICE INDUSTRIES TRAINING LIMITED | 01741451 | 09/06/1999 | 16/07/2003 | Dissolved |
| WATER UK | 03539600 | 17/06/1998 | 16/11/2005 | Bronze |
| WATERAID | 01787329 | 04/06/2003 | 03/03/2006 | Silver |
| WAVE WATER LIMITED | 02702745 | 08/01/1998 | 01/02/2002 | Silver |