| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ASSOCIATION FOR INDUSTRIAL ARCHAEOLOGY | 01326854 | 12/09/1993 | 12/09/1999 | Gold |
| ROADS AND ROAD TRANSPORT HISTORY ASSOCIATION LIMITED | 05300873 | 30/11/2004 | 19/03/2005 | Dissolved |
| ROADS AND ROAD TRANSPORT HISTORY ASSOCIATION LIMITED | 05300873 | 30/11/2004 | 24/03/2007 | Dissolved |
| SURREY ARCHAEOLOGICAL SOCIETY | 01160052 | 01/01/1992 | 01/01/1996 | Silver |
| Supported Study Programmes Limited | 02346885 | 07/06/1991 | 28/05/1993 | Dissolved |
| THE NEWCOMEN SOCIETY FOR THE STUDY OF THE HISTORY OF ENGINEERING AND TECHNOLOGY | 00691545 | 13/10/1993 | 09/10/1996 | Silver |