| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BALFOUR BEATTY ENGINEERING SERVICES (HY) LIMITED | 00215402 | 01/01/1998 | 14/05/1999 | Not Trading |
| BRIGGS & FORRESTER GROUP LIMITED | 04342869 | 01/12/2013 | 16/01/2017 | Silver |
| BRIGGS & FORRESTER LIMITED | 05851954 | 01/12/2013 | 16/01/2017 | Bronze |
| CLIMATE SERVICES LIMITED | 00703568 | 01/01/2002 | 31/07/2003 | Dissolved |
| CLIMAVENETA UK LIMITED | 00788610 | 01/01/2002 | 03/10/2002 | Dissolved |
| COMMUNICATIONS INSTALLATIONS TECHNOLOGY LIMITED | 00609981 | 01/01/2002 | 31/07/2003 | Dissolved |
| DELCOMMERCE (CONTRACT SERVICES) LIMITED | 01363817 | 01/08/2009 | 31/03/2012 | Dissolved |
| DRAKE & SCULL (SCOTLAND) LIMITED | SC010649 | 01/08/2009 | 31/03/2012 | Strike Off |
| DRAKE & SCULL HOLDINGS LIMITED | 00070275 | 01/08/2009 | 31/03/2012 | Dissolved |
| DRAKE & SCULL PROPERTIES | 00905382 | 01/08/2009 | 31/03/2012 | Dissolved |
| EMCOR ENGINEERING SERVICES LIMITED | 03667540 | 01/11/2003 | 31/03/2012 | Not Trading |
| EMCOR GROUP (UK) PLC | 00806888 | 01/11/2003 | 31/03/2012 | Gold |
| EMCOR RAIL LIMITED | 03667538 | 01/08/2009 | 31/03/2012 | Not Trading |
| EMERIO LTD | 01275207 | 01/01/2002 | 31/07/2003 | Dissolved |
| EURO AS LIMITED | 01894381 | 01/01/2002 | 31/07/2003 | Dissolved |
| HOW ENGINEERING SERVICES LIMITED | 00725578 | 14/05/1999 | 31/07/2003 | Insolvent |
| HOW ENGINEERING SERVICES NORTHERN LIMITED | 00725566 | 14/05/1999 | 16/10/2000 | Insolvent |
| HOW ENGINEERING SERVICES SCOTLAND LIMITED | SC061035 | 14/05/1999 | 31/07/2003 | Dissolved |
| HOW ENGINEERING SERVICES SOUTHERN LIMITED | 00518298 | 14/05/1999 | 16/10/2000 | Dissolved |
| HOW INTERNATIONAL LIMITED | 00759483 | 14/05/1999 | 16/10/2000 | Strike Off |
| MITIE (FACILITIES SERVICES) LIMITED | 00725583 | 01/01/2002 | 31/07/2003 | Insolvent |
| MITIEFM SERVICES LIMITED | 02820560 | 01/01/2002 | 31/07/2003 | One Red Flag |
| TILBURY DOUGLAS CONSTRUCTION LIMITED | 00303359 | 01/08/2001 | 31/03/2002 | Silver |