| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BRADFIELD NO.1 LIMITED | 02675283 | 27/10/1999 | Dissolved |
| Bamfords International Ltd | 01591831 | 27/10/1999 | Dissolved |
| Bradfield No 11 Ltd | 02814574 | 27/10/1999 | Dissolved |
| Bradfield No.4 Ltd | 02595887 | 27/10/1999 | Dissolved |
| Bradfield No.7 Ltd | 00634394 | 27/10/1999 | Dissolved |
| Bradfield No.8 Ltd | 02588478 | 27/10/1999 | Dissolved |
| County Tractors Ltd | 01709797 | 27/10/1999 | Dissolved |
| DIFFUSION LIFTS SERVICES LIMITED | 02716063 | 27/10/1999 | Dissolved |
| DIFFUSION SALES LIMITED | 04742777 | 24/04/2003 | Dissolved |
| Et Finance Ltd | 02912033 | 27/10/1999 | Dissolved |
| Et Project Management Ltd | 02675284 | 27/10/1999 | Dissolved |
| GREENWAYS ACCESS LIMITED | 10789968 | 01/05/2018 | Bronze |
| Neepsend Investment Company Limited | 00973107 | 27/10/1999 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| COUNTYTRAC LIMITED | 00845061 | 27/10/1999 | 07/04/2000 | Silver |
| DIFFUSION BMS LIMITED | 00678859 | 02/06/1992 | 14/02/1994 | Dissolved |
| DIFFUSION ENVIRONMENTAL SYSTEMS LIMITED | 04743023 | 24/04/2003 | 03/09/2018 | Not Trading |
| ENERGY TECHNIQUE LIMITED | 00013273 | 01/05/1997 | 11/04/2006 | Not Trading |
| ET ENVIRONMENTAL LIMITED | 00759625 | 18/01/1996 | 20/07/2018 | Not Trading |
| EVOLUTION TECHNICAL SERVICES LIMITED | 04742763 | 24/04/2003 | 24/03/2011 | Bronze |
| FAT BOY PRODUCTION LTD | 08143454 | 16/07/2012 | 30/11/2016 | Not Trading |
| REGAL ENVIRONMENTAL SYSTEMS LIMITED | 03037242 | 28/11/1995 | 02/04/1996 | Gold |
| UVGI SYSTEMS LIMITED | 04461495 | 22/10/2002 | 07/08/2006 | Dissolved |