| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| INSTA COUSTIC LIMITED | 02194536 | 01/07/2011 | Amber |
| INSTAGROUP LTD | 01500228 | 01/07/2009 | Gold |
| SNUG NETWORK LIMITED | 12034426 | 05/06/2019 | Not Trading |
| SUN SUPPLY LTD | 09706434 | 28/07/2015 | Dissolved |
| THE ASSOCIATION FOR DECENTRALISED ENERGY | 00917116 | 13/12/2017 | Silver |
| THE CAVITY INSULATION GUARANTEE AGENCY | 03044131 | 12/05/2015 | Bronze |
| THE INSTALLATION ASSURANCE AUTHORITY LIMITED | 12483858 | 21/04/2020 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ASSOCIATION FOR THE CONSERVATION OF ENERGY LIMITED | 01650772 | 08/07/2015 | 30/10/2020 | Amber |
| GDFC SERVICES PLC | 08271985 | 16/12/2015 | 13/01/2017 | Amber |
| TGDFC LIMITED | 07980777 | 16/12/2015 | 18/01/2017 | Dissolved |