| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| AMERSHAM ROAD MANAGEMENT LIMITED | 07962037 | 05/01/2015 | Gold |
| Cwr Consultants Ltd | 04217086 | 15/05/2001 | Dissolved |
| GLYN CANNON LIMITED | 04833578 | 15/07/2003 | Amber |
| Innovative Dental Products Ltd | 02546675 | 08/10/1991 | Dissolved |
| JOHN JEWELL CONSULTING LIMITED | 06406737 | 23/10/2007 | Dissolved |
| KINGSLEIGH CONSULTANCY SERVICES LTD | 08597861 | 04/07/2013 | Gold |
| Operations Solutions Ltd | 03800371 | 05/07/1999 | Dissolved |
| Thameslaw (2005) Ltd | 05324208 | 05/01/2005 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ALVASTON MANAGEMENT COMPANY LIMITED | 07730136 | 13/08/2013 | 25/11/2016 | Gold |
| CANNON MOORCROFT LIMITED | 04523821 | 02/09/2002 | 31/03/2013 | Silver |
| CLAUSEIMAGE LIMITED | 03799760 | 15/07/1999 | 27/10/2014 | Dissolved |
| Enviro-Sol (U K) Ltd | 03010138 | 16/01/1995 | 07/11/1995 | Dissolved |
| G.T.A.W. Ltd | 02767197 | 24/11/1992 | 12/02/1997 | Dissolved |
| HOUSLEY CAD SERVICES LIMITED | 04579292 | 01/11/2002 | 29/03/2007 | Silver |
| HUGHENDEN COURT MANAGEMENT COMPANY LIMITED | 02283548 | 04/10/1994 | 11/04/2013 | Gold |
| HYPA COLOUR LIMITED | 03290934 | 19/04/2007 | 14/08/2014 | Dissolved |
| ON-TIME COMMUNICATIONS LIMITED | 03439484 | 04/06/1998 | 04/10/2005 | Dissolved |