| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| IET SERVICES LIMITED | 00909719 | 01/10/1993 | 25/11/1997 | Silver |
| LEEDS, YORK AND NORTH YORKSHIRE CHAMBER OF COMMERCE AND INDUSTRY | 00014183 | 09/05/1991 | 28/01/1992 | Not Trading |
| NATIONAL GRID HOLDINGS ONE PLC | 02367004 | 15/08/1991 | 01/12/1991 | Silver |
| NUCLEAR LIABILITIES FUND LIMITED | SC164685 | 28/03/1996 | 31/03/2008 | Silver |
| PARSONS BRINCKERHOFF LTD | 02554514 | 06/10/1998 | 31/03/2002 | Bronze |
| Pb Power Holdings Ltd | 02560063 | 13/06/1995 | 06/01/1999 | Dissolved |
| Psb Holding Ltd | 03043380 | 10/11/1995 | 13/02/1997 | Dissolved |
| THE LADY HEWLEY CHARITY TRUST COMPANY LIMITED | 02672189 | 01/10/1996 | 03/06/2008 | Amber |