| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CEDARS CASTLE HILL | 03913377 | 25/01/2000 | 04/07/2014 | One Red Flag |
| ECA AFFINITY SERVICES LIMITED | 05131470 | 18/06/2007 | 12/03/2009 | Gold |
| ECA CERTIFICATION LIMITED | 06418028 | 06/03/2009 | 31/12/2016 | Amber |
| ELECTRICAL CONTRACTORS ASSOCIATION LIMITED(THE) | 00143669 | 24/07/2002 | 26/04/2006 | Gold |
| EXWES1 LIMITED | 02760276 | 29/10/1993 | 01/11/2023 | Not Trading |
| EXWES2 LIMITED | 03541803 | 07/04/1998 | 01/11/2023 | Not Trading |
| EXWES3 LIMITED | 03554693 | 29/04/1998 | 01/11/2023 | Not Trading |
| EXWES4 LIMITED | 03541810 | 07/04/1998 | 01/11/2023 | Not Trading |
| EXWES5 LIMITED | 03666054 | 11/11/1998 | 01/11/2023 | Not Trading |
| INSIGHT CERTIFICATION LIMITED | 02525516 | 10/07/2001 | 05/05/2009 | Gold |
| NATIONAL FACILITIES MANAGEMENT LTD. | 04728326 | 09/04/2003 | 18/01/2006 | Dissolved |
| T.W. KING & SON LTD | 04188688 | 28/03/2001 | 01/09/2007 | Dissolved |
| WCM (NATIONAL) LTD | 03673821 | 25/11/1998 | 28/02/2008 | Bronze |
| WESSEX BUILDING SERVICES LIMITED | 04487580 | 16/07/2002 | 18/01/2006 | Dissolved |
| WESSEX ELECTRICALS (SHAFTESBURY) LIMITED | 01053323 | 15/05/1991 | 18/01/2006 | Silver |
| WESSEX FIRE AND SECURITY LIMITED | 03541805 | 07/04/1998 | 18/01/2006 | Silver |
| WESSEX GROUP LIMITED | 02457125 | 08/01/1992 | 18/01/2006 | Silver |