| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| Dillon Computing & Management Services Ltd | 01461514 | 06/12/1991 | 06/01/1993 | Dissolved |
| KELNIGAL (UK) LIMITED | 01899187 | 06/11/1992 | 06/01/1993 | Dissolved |
| OSCAR FABER TPA LIMITED | SC073900 | 11/11/1988 | 19/07/1993 | Dissolved |
| Transportation Planning Associates Ltd | 02776867 | 11/01/1993 | 09/07/1993 | Dissolved |
| WSP CIVILS LIMITED | 02430067 | 14/06/1994 | 25/11/1997 | Dissolved |
| WSP EUROPEAN HOLDINGS LIMITED | 04121721 | 30/07/2003 | 22/09/2008 | Gold |
| WSP MANAGEMENT SERVICES LIMITED | 02454665 | 01/01/1998 | 31/12/2006 | Silver |