| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BRITISH PRECAST CONCRETE FEDERATION LIMITED(THE) | 01209092 | 06/05/1999 | 30/05/2002 | Gold |
| CAREWAYS TRUST LIMITED | 00464822 | 15/10/1993 | 28/09/1994 | Dissolved |
| CONCRETE BRIDGE DEVELOPMENT GROUP | 02693085 | 10/06/1993 | 28/06/1994 | Gold |
| CONCRETE SOCIETY LIMITED(THE) | 00884419 | 31/07/2002 | 27/04/2006 | Gold |
| COSTAIN BUILDING PRODUCTS LIMITED | 00384636 | 28/02/1993 | 29/12/1995 | Dissolved |
| HOLLOW CORE INTERNATIONAL LIMITED | 06964125 | 04/08/2014 | 07/11/2016 | Dissolved |
| ISTRUCTE LTD | 02444141 | 08/10/1993 | 05/10/1995 | Gold |
| TARMAC PRECAST CONCRETE LIMITED | 03224010 | 01/07/1997 | 30/04/2005 | Dissolved |
| THE INSTITUTION OF STRUCTURAL ENGINEERS BENEVOLENT FUND | 03087463 | 02/08/1995 | 23/05/1996 | One Red Flag |
| THE INSTITUTION OF STRUCTURAL ENGINEERS EDUCATIONAL TRUST | 02572820 | 27/08/1993 | 14/06/2001 | Dissolved |