| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BOX CLEVER PROJECTS LIMITED | 08747700 | 31/07/2017 | Silver |
| C & C INDUSTRIAL GROUP LIMITED | 07234664 | 01/08/2015 | Bronze |
| COOLERS & CONDENSERS LIMITED | 01778335 | 01/08/2015 | Bronze |
| CRB GROUP LIMITED | 12329976 | 25/11/2019 | Amber |
| RIPLEY ENGINEERING LIMITED | 08514678 | 01/08/2015 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| AIRSYS COMMUNICATIONS TECHNOLOGY LIMITED | 02671582 | 14/09/2001 | 30/09/2005 | One Red Flag |
| Airsys International Ltd | 01622929 | 26/04/2001 | 30/09/2005 | Dissolved |
| Airsys International Ltd | 01622929 | 30/10/2001 | 31/05/2003 | Dissolved |
| Airsys Telematics Ltd | 05380092 | 02/03/2005 | 30/09/2005 | Dissolved |
| EVENT COMMUNICATIONS SERVICES LIMITED | 02677188 | 01/10/2001 | 30/09/2005 | Bronze |
| Ecosse 1999 Ltd | 02734196 | 04/09/2002 | 30/09/2005 | Dissolved |
| European Radio Supplies Ltd | 01953156 | 14/09/2001 | 30/09/2005 | Dissolved |
| FORESOLUTIONS LIMITED | 01392996 | 01/05/2001 | 30/09/2005 | Silver |
| Mobile Radio Ltd | 01862105 | 02/05/2001 | 30/09/2005 | Dissolved |
| Mobile Radio Ltd | 01862105 | 02/05/2001 | 31/05/2003 | Dissolved |
| RADIO TECHNOLOGY HOLDINGS LIMITED | 03614689 | 30/09/2001 | 30/09/2005 | Silver |
| RADIO TECHNOLOGY HOLDINGS LIMITED | 03614689 | 30/09/2001 | 30/09/2005 | Silver |
| WIREFIELD LIMITED | 02628148 | 31/08/2006 | 31/07/2015 | Gold |
| WIREFIELD LIMITED | 02628148 | 01/11/2007 | 31/07/2015 | Gold |