| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Buildingcare Ltd | 02877021 | 25/02/1994 | Dissolved |
| Cairns & Byles Ltd | 02777833 | 01/01/1999 | Dissolved |
| Decimal Technology Ltd | 02149721 | 08/04/1997 | Dissolved |
| Graham Consulting Trust Co Ltd | 02403799 | 08/04/1997 | Dissolved |
| Graham,Frank,International Ltd | 01895685 | 08/04/1997 | Dissolved |
| Parsons Brown Management Services Ltd | 01982889 | 31/12/1998 | Dissolved |
| W S P International Holdings Ltd | 02654621 | 01/06/1994 | Dissolved |
| Williams Sale Partnership Ltd | 02771682 | 08/12/1993 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| DT GLOBAL INTERNATIONAL DEVELOPMENT UK LTD | 02651349 | 01/01/1999 | 29/12/2000 | Bronze |
| Intec Management Ltd | 01214120 | 01/01/1994 | 01/08/1997 | Dissolved |
| WSP CIVILS LIMITED | 02430067 | 08/04/1997 | 31/12/1998 | Dissolved |
| WSP ENVIRONMENTAL LIMITED | 01152332 | 31/12/1995 | 31/12/1998 | Dissolved |
| WSP FULCRUM LIMITED | 02584791 | 22/02/1991 | 09/08/1999 | Dissolved |
| WSP MANAGEMENT SERVICES LIMITED | 02454665 | 28/05/1992 | 01/01/1994 | Silver |
| WSP MIDLANDS LIMITED | 02753617 | 07/10/1992 | 01/07/1997 | Dissolved |
| WSP NORTH LIMITED | 02257665 | 09/06/1991 | 05/11/1993 | Dissolved |
| WSP REMEDIATION LIMITED | 02623378 | 31/12/1995 | 16/03/1999 | Dissolved |
| WSP SYSTEMS LIMITED | 02395826 | 01/01/1993 | 28/11/1993 | Dissolved |
| WSP UK LIMITED | 01383511 | 18/05/1991 | 01/06/1994 | Gold |