| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ODDBALL MOTOR COMPANY LONDON LTD | 15184068 | 03/10/2023 | Bronze |
| THE DISTRICT ENERGY PARTNERSHIP LTD | 11059228 | 10/11/2017 | Not Trading |
| THE UK DISTRICT ENERGY ASSOCIATION | 07253337 | 13/05/2010 | Gold |
| WOODWARD ENERGY CONSULTING LTD | 09080011 | 10/06/2014 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BIRMINGHAM DISTRICT ENERGY COMPANY LIMITED | 05988953 | 06/11/2006 | 30/06/2014 | One Red Flag |
| BLOOMSBURY HEAT & POWER LIMITED | 03626472 | 21/11/2003 | 30/06/2014 | Silver |
| BRING ENERGY CONCESSIONS LIMITED | 02240219 | 21/11/2003 | 30/06/2014 | Bronze |
| BRING ENERGY LIMITED | 01506399 | 21/11/2003 | 30/06/2014 | One Red Flag |
| BRING ENERGY SERVICES LIMITED | 04513466 | 19/08/2002 | 30/06/2014 | One Red Flag |
| COVENTRY DISTRICT ENERGY COMPANY LIMITED | 08090838 | 31/05/2012 | 30/06/2014 | One Red Flag |
| EAST LONDON ENERGY LIMITED | 06307742 | 24/11/2010 | 30/06/2014 | One Red Flag |
| EXCEL DISTRICT ENERGY COMPANY LIMITED | 08341688 | 27/12/2012 | 30/06/2014 | One Red Flag |
| GOWER STREET HEAT AND POWER LIMITED | 04070944 | 13/10/2000 | 30/06/2014 | Dissolved |
| INDUSTRIELLE DE CHAUFFAGE ENTERPRISE UNITED KINGDOM LIMITED | 03463584 | 21/11/2003 | 30/06/2014 | Dissolved |
| LEICESTER DISTRICT ENERGY COMPANY LIMITED | 05847251 | 15/06/2006 | 30/06/2014 | Bronze |
| SOUTHAMPTON GEOTHERMAL HEATING COMPANY LIMITED(THE) | 02053176 | 21/11/2003 | 30/06/2014 | One Red Flag |
| SUTTON DECENTRALISED ENERGY NETWORK LIMITED | 10022446 | 23/02/2016 | 24/04/2017 | One Red Flag |