| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ASSOCIATION OF INDEPENDENT MUSEUMS | 01350939 | 05/07/1991 | 06/05/2005 | Gold |
| MUSEUM OF INDUSTRIAL ARCHAEOLOGY LIMITED | 00921105 | 22/10/1991 | 16/02/2008 | Dissolved |
| T.M.S. (ENTERPRISES) LIMITED | 02035629 | 20/07/1991 | 11/09/2008 | Dissolved |
| TRAMWAY MUSEUM SERVICES LIMITED | 00607005 | 06/10/1991 | 01/11/2008 | Dissolved |
| TRAMWAY MUSEUM SOCIETY(THE) | 00744229 | 02/06/1992 | 11/06/2005 | Silver |
| TRANSPORT HISTORY RESEARCH TRUST | 02329418 | 12/12/1991 | 06/07/2008 | Dissolved |