| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| British Motor Ship Owners' Association Ltd | 00164891 | 08/11/1990 | Dissolved |
| Epic Training & Consulting Services Ltd | 05041949 | 01/03/2004 | Dissolved |
| SUTTON LEACH ASSOCIATES LIMITED | 07864464 | 12/12/2011 | Gold |
| TARMAC QUARRY PRODUCTS LIMITED | 03243000 | 15/07/1998 | Dissolved |
| Tarmac (Sts) Ltd | 03593143 | 19/07/1999 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ARKWRIGHT SOCIETY LIMITED(THE) | 01630237 | 07/04/1999 | 01/10/1999 | Silver |
| BARKER & BENCE LIMITED | 00615650 | 01/04/1999 | 05/07/2001 | Insolvent |
| BERWYN GRANITE QUARRIES LIMITED | 00081357 | 18/09/1998 | 18/08/2000 | Silver |
| BRISTOL CHANNEL AGGREGATES LIMITED | 02730574 | 01/10/1992 | 01/09/1997 | Dissolved |
| Blackwall Aggregates Ltd | 02299764 | 21/11/1992 | 30/09/1997 | Dissolved |
| EPICENTRE-UK LTD | 04858439 | 18/03/2004 | 14/06/2006 | Dissolved |
| ETON AGGREGATES LIMITED | 02950542 | 31/07/1998 | 31/07/2000 | Dissolved |
| INSTITUTE OF QUARRYING(THE) | 00606601 | 17/10/1997 | 29/09/2015 | One Red Flag |
| LTM (CITY OF LONDON) LIMITED | 02438805 | 04/01/1999 | 22/11/2000 | Silver |
| LTM (CITY OF WESTMINSTER) LIMITED | 02488552 | 04/01/1999 | 22/11/2000 | One Red Flag |
| LTM (SOUTHERN) LIMITED | 01908305 | 04/01/1999 | 22/11/2000 | Bronze |
| LTM (WESTERN) LIMITED | 02139984 | 04/01/1999 | 22/11/2000 | One Red Flag |
| MERSEY SAND SUPPLIERS LIMITED | 03617869 | 01/04/1999 | 05/07/2001 | Silver |
| MIDLAND QUARRY PRODUCTS LIMITED | 03173418 | 01/09/1998 | 02/10/2006 | Silver |
| MINERAL PRODUCTS ASSOCIATION LIMITED | 01634996 | 31/03/2004 | 06/07/2006 | Bronze |
| MINERAL PRODUCTS QUALIFICATIONS COUNCIL | 01695822 | 22/11/2012 | 31/12/2015 | Bronze |
| NATIONAL STONE CENTRE(THE) | 01817304 | 14/06/2001 | 14/06/2006 | Bronze |
| NORWEST SAND & BALLAST CO. (1985) | 00484592 | 01/04/1999 | 05/07/2001 | Insolvent |
| NORWEST SAND & BALLAST COMPANY LIMITED | 01895470 | 01/04/1999 | 05/07/2001 | Insolvent |
| OVAL (302) LIMITED | 02109915 | 01/04/1999 | 05/07/2001 | Insolvent |
| R.H. ROADSTONE LIMITED | 01923855 | 31/07/1998 | 01/01/2001 | Silver |
| RANCHAUS NO 16 LIMITED | 03360906 | 09/06/1999 | 31/05/2003 | Dissolved |
| SOLENT AGGREGATES LIMITED | 02730599 | 01/10/1992 | 05/09/1997 | Not Trading |
| TARMAC MARINE LIMITED | 02105370 | 24/03/1992 | 22/11/2000 | Silver |
| TAYESTONE RECYCLED AGGREGATES LIMITED | 03193043 | 02/05/1998 | 01/09/1998 | Dissolved |
| UNITED MARINE AGGREGATES LIMITED | 02336081 | 01/07/1991 | 22/11/2000 | Insolvent |
| UNITED MARINE HOLDINGS LIMITED | 02446702 | 30/09/1997 | 22/11/2000 | Dissolved |