| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BMCONSULT LTD | 03785547 | 09/06/1999 | Dissolved |
| Sira Group Ltd | 03444757 | 23/07/2001 | Dissolved |
| Sira Ltd | 00150576 | 06/06/2001 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BRE GROUP LIMITED | 02704081 | 27/02/2007 | 20/04/2010 | Amber |
| BRE TRUST | 03282856 | 30/11/1999 | 31/03/2002 | Silver |
| BUILDING RESEARCH ESTABLISHMENT LIMITED | 03319324 | 19/10/1998 | 26/06/2007 | Amber |
| CATALIS GROUP LIMITED | 03351659 | 05/06/1998 | 24/04/1999 | Dissolved |
| CATALIS LIMITED | 04086015 | 17/02/2001 | 18/04/2001 | Dissolved |
| CTRL (UK) LIMITED | 03578740 | 13/07/1998 | 31/03/1999 | Not Trading |
| JARVIS PLC | 02238084 | 03/10/2002 | 03/09/2009 | Dissolved |
| KIER PARKMAN METRO LIMITED | 02788150 | 01/10/2000 | 31/12/2002 | Dissolved |
| LONDON UNDERGROUND LIMITED | 01900907 | 30/08/1991 | 31/03/1995 | Bronze |
| Metropower Ltd | 02557760 | 13/11/1992 | 31/03/1995 | Dissolved |
| NETWORK RAIL INFRASTRUCTURE LIMITED | 02904587 | 31/03/1995 | 31/03/1999 | Bronze |
| Paul Martin | 03336781 | 21/01/1998 | 14/07/2000 | Dissolved |
| R T Group Plc | 02904614 | 31/03/1995 | 31/03/1999 | Dissolved |
| THE DERBY CONFERENCE CENTRE LIMITED | 03061642 | 21/06/1999 | 07/09/2001 | Bronze |
| UNION RAILWAYS (SOUTH) LIMITED | 03540185 | 18/02/1999 | 31/03/1999 | Dissolved |