| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Clifton Capital Investments Ltd | 04669287 | 06/05/2003 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AFFINITY WATER LIMITED | 02546950 | 01/04/1998 | 03/06/2000 | Amber |
| BRIDGEND CUSTODIAL SERVICES LIMITED | 03045222 | 02/06/2000 | 31/12/2001 | Insolvent |
| C. G. NOMINEES LIMITED | 01445212 | 02/06/2000 | 31/12/2001 | Dissolved |
| CLM ENGINEERING (OVERSEAS) LIMITED | 02992285 | 02/06/2000 | 31/12/2001 | Not Trading |
| COSTAIN ALCAIDESA LIMITED | 02042076 | 02/06/2000 | 31/12/2001 | Bronze |
| COSTAIN BUILDING & CIVIL ENGINEERING LIMITED | 01054232 | 02/06/2000 | 31/12/2001 | Gold |
| COSTAIN BUILDING PRODUCTS LIMITED | 00384636 | 02/06/2000 | 31/12/2001 | Dissolved |
| COSTAIN CIVIL ENGINEERING LIMITED | 02757907 | 02/06/2000 | 31/12/2001 | Amber |
| COSTAIN CONSTRUCTION LIMITED | 00563270 | 02/06/2000 | 31/12/2001 | Not Trading |
| COSTAIN ENGINEERING & CONSTRUCTION (OVERSEAS) LIMITED | 02440830 | 02/06/2000 | 31/12/2001 | Gold |
| COSTAIN ENGINEERING & CONSTRUCTION LIMITED | 02440829 | 02/06/2000 | 31/12/2001 | Gold |
| COSTAIN GROUP PLC | 01393773 | 02/06/2000 | 31/12/2001 | Gold |
| COSTAIN INTERNATIONAL LIMITED | 00563275 | 02/06/2000 | 31/12/2001 | Amber |
| COSTAIN LIMITED | 00610201 | 02/06/2000 | 31/12/2001 | Silver |
| COSTAIN OIL, GAS & PROCESS (OVERSEAS) LIMITED | 00583789 | 02/06/2000 | 31/12/2001 | Not Trading |
| COSTAIN OIL, GAS & PROCESS LIMITED | 00786418 | 02/06/2000 | 31/12/2001 | One Red Flag |
| COSTAIN PROCESS CONSTRUCTION LIMITED | 00590330 | 02/06/2000 | 31/12/2001 | Not Trading |
| COUNTY & DISTRICT PROPERTIES LIMITED | 00675355 | 28/03/2001 | 31/12/2001 | Silver |
| Clm Engineering Ltd | 02617370 | 02/06/2000 | 31/12/2001 | Dissolved |
| Costain Environmental Services Ltd | 02568196 | 02/06/2000 | 31/12/2001 | Dissolved |
| Costain Interiors Ltd | 03256841 | 02/06/2000 | 31/12/2001 | Dissolved |
| Costain International Management Ltd | 01747835 | 02/06/2000 | 24/08/2000 | Dissolved |
| HPC KING'S COLLEGE HOSPITAL (HOLDINGS) LIMITED | 03847393 | 26/06/2000 | 14/01/2002 | Amber |
| HPC KING'S COLLEGE HOSPITAL (ISSUER) PLC. | 03817681 | 26/06/2000 | 14/01/2002 | Bronze |
| HPC KING'S COLLEGE HOSPITAL LIMITED | 03696260 | 26/06/2000 | 14/01/2002 | Amber |
| MCBRIDE PLC | 02798634 | 16/04/2002 | 10/05/2006 | Bronze |
| NATIONAL ROAD OPERATORS LIMITED | 02969113 | 02/06/2000 | 31/12/2001 | Dissolved |
| RENOWN INVESTMENTS (HOLDINGS) LIMITED | 00683698 | 02/06/2000 | 31/12/2001 | Gold |
| RICHARD COSTAIN LIMITED | 00274453 | 02/06/2000 | 31/12/2001 | Bronze |
| ROBERT MCBRIDE PENSION FUND TRUSTEES LIMITED | 02851207 | 09/05/2002 | 06/01/2005 | Not Trading |
| WESTMINSTER PLANT CO. LIMITED | 00552140 | 02/06/2000 | 31/12/2001 | Not Trading |