| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BRITISH TUNGSTEN LIMITED | 00506142 | 24/01/1991 | Gold |
| FW HEMPEL METALS UK LIMITED | 02052311 | 24/01/1992 | Silver |
| H A WATSON LIMITED | 04927088 | 22/10/2003 | Dissolved |
| LEIGH & SILLAVAN LIMITED | 04144609 | 14/02/2001 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AGW COMMODITY HOLDINGS LIMITED | 01066891 | 16/06/1998 | 24/10/2013 | Dissolved |
| AGW COMMODITY HOLDINGS LIMITED | 01066891 | 24/01/1992 | 08/06/2015 | Dissolved |
| AIRCO METALS LTD | 06246882 | 14/05/2007 | 24/10/2013 | Dissolved |
| BRITISH TUNGSTEN LIMITED | 00506142 | 16/06/1998 | 24/10/2013 | Gold |
| CENTRAL WIRE INDUSTRIES UK LIMITED | 01026114 | 16/06/1998 | 24/10/2013 | Silver |
| CENTRAL WIRE INDUSTRIES UK LIMITED | 01026114 | 24/01/1992 | 27/02/2015 | Silver |
| FW HEMPEL METALS UK LIMITED | 02052311 | 16/06/1998 | 24/10/2013 | Silver |
| H A WATSON LIMITED | 04927088 | 22/10/2003 | 24/10/2013 | Dissolved |
| HEMPEL FIRMUS METALS LIMITED | 02302293 | 16/06/1998 | 15/02/2013 | Not Trading |
| HEMPEL SPECIAL METALS LTD | 01671717 | 16/06/1998 | 03/07/2012 | Gold |
| HEMPEL SPECIAL METALS LTD | 01671717 | 07/07/1991 | 03/07/2012 | Gold |
| LEIGH & SILLAVAN LIMITED | 04144609 | 14/02/2001 | 24/10/2013 | Dissolved |
| WATSON WIRE LTD | 06247571 | 15/05/2007 | 24/10/2013 | Dissolved |
| WB THE CREATIVE JEWELLERY GROUP LIMITED | 00465213 | 15/07/2010 | 22/01/2018 | Bronze |
| WESTON BEAMOR HOLDINGS LIMITED | 04933065 | 15/07/2010 | 22/01/2018 | Bronze |