| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BIOFLAME LIMITED | 04188365 | 27/03/2001 | Dissolved |
| BUCHANAN (1983) LIMITED | 00721349 | 04/03/1999 | One Red Flag |
| BUCHANAN (1983) LIMITED | 00721349 | 19/08/1991 | One Red Flag |
| Bioflame Fuels Ltd | 04946732 | 10/11/2003 | Dissolved |
| Buchanan & Wilson Ltd | 06132472 | 01/03/2007 | Dissolved |
| Buchanan & Wilson Ltd | 06132472 | 01/03/2007 | Dissolved |
| DALLOL ENERGY LIMITED | 07908212 | 30/07/2012 | Silver |
| GLOBALFLAME LIMITED | 04134069 | 23/04/2001 | Dissolved |
| GOOD EARTH RENEWABLES LTD | 07752562 | 25/08/2011 | Dissolved |
| KIV (UK) LTD | 06076320 | 28/03/2012 | Dissolved |
| KIVETON HEAT & POWER LIMITED | 07608220 | 19/04/2011 | Dissolved |
| MBPS (1994) LIMITED | 05762660 | 30/03/2006 | Dissolved |
| MBPS (1994) LIMITED | 05762660 | 30/03/2006 | Dissolved |
| YORWASTE HEAT & POWER LIMITED | 07147194 | 08/04/2010 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| NATURAL ECOLOGY MITIGATION LIMITED | 06736144 | 28/01/2013 | 01/11/2015 | One Red Flag |
| NRL HEAT & POWER LIMITED | 06987849 | 11/08/2009 | 21/11/2012 | Dissolved |
| P. B. M. POWER LIMITED | 05169013 | 02/07/2004 | 07/09/2011 | Dissolved |
| SANDSFIELD HEAT & POWER LIMITED | 06680941 | 26/08/2008 | 07/09/2011 | Dissolved |
| TRIDENT TECHNOLOGY LTD | 08105065 | 01/09/2012 | 03/01/2013 | One Red Flag |
| TWINWOODS HEAT & POWER LIMITED | 06799288 | 23/01/2009 | 07/09/2011 | One Red Flag |