| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Guaranteed Asphalt Holdings Plc | 01043545 | 01/09/1993 | Dissolved |
| Guaranteed Asphalt Holdings Plc | 01043545 | 30/04/1991 | Dissolved |
| LONDON ASPHALT AND ROOFING LIMITED | 02834276 | 01/06/1995 | Dissolved |
| Tarl (Northampton) Ltd | 01168493 | 26/03/1991 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ASPHALT PLANT LIMITED | 02841110 | 08/07/2004 | 18/07/2007 | One Red Flag |
| CORBY ASPHALT AND ROOFING LIMITED | 03305056 | 28/02/1997 | 18/07/2007 | Dissolved |
| GUARANTEED ASPHALT LIMITED | 03320682 | 28/02/1997 | 18/11/1998 | Bronze |
| IPOS TRADE AND CONSULTING LTD | 03320680 | 28/02/1997 | 18/03/1997 | One Red Flag |
| Mastic Asphalt Producers Association | 01901406 | 11/06/1992 | 02/10/1992 | Dissolved |
| THE ASPHALT COMPANY LTD. | 02841100 | 01/10/1993 | 08/04/1998 | Dissolved |
| THE MASTIC ASPHALT COUNCIL LIMITED | 00944387 | 12/06/2000 | 06/02/2009 | Gold |
| Trinidad Asphalt Ltd | 03569067 | 22/05/1998 | 02/11/2000 | Dissolved |