| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BIFFA GROUP HOLDINGS (UK) LIMITED | 04081901 | 18/03/2005 | 30/08/2006 | Silver |
| BRITISH AIRWAYS AVIONIC ENGINEERING LIMITED | 02775232 | 01/04/1998 | 04/03/1999 | Silver |
| BRITISH AIRWAYS MAINTENANCE CARDIFF LIMITED | 02204178 | 13/02/1997 | 04/03/1999 | Bronze |
| BRITISH AIRWAYS PENSION TRUSTEES LIMITED | 00453632 | 12/11/1997 | 05/09/2001 | Amber |
| DX NETWORK SERVICES LIMITED | 05026914 | 27/01/2004 | 30/06/2004 | Silver |
| HAYS COMMERCIAL SERVICES LIMITED | 00726089 | 01/11/2002 | 30/06/2004 | Dissolved |
| HAYS HOLDINGS LTD | 00093338 | 01/11/2002 | 30/06/2004 | Not Trading |
| HAYS OVERSEAS HOLDINGS LIMITED | 00964234 | 01/11/2002 | 30/06/2004 | Not Trading |
| HAYS PLC | 02150950 | 01/11/2002 | 30/06/2004 | Silver |
| HAYS SPECIALIST RECRUITMENT (HOLDINGS) LIMITED | 00934047 | 01/11/2002 | 30/06/2004 | Silver |
| HEATHROW AIRPORT HOLDINGS LIMITED | 05757208 | 18/09/2008 | 30/06/2014 | Silver |
| HEATHROW AIRPORT LIMITED | 01991017 | 08/10/2012 | 30/06/2014 | Silver |
| HEATHROW HOLDCO LIMITED | 06408400 | 08/10/2012 | 30/06/2014 | Bronze |
| KUEHNE + NAGEL LIMITED | 01722216 | 01/11/2002 | 04/02/2004 | Silver |
| LATTICE GROUP LIMITED | 03900804 | 01/11/2001 | 21/10/2002 | Silver |
| LHR AIRPORTS LIMITED | 01970855 | 08/10/2012 | 30/06/2014 | Silver |
| LINDLEY EDUCATIONAL TRUST LIMITED | 00867065 | 29/07/2002 | 26/06/2004 | Bronze |
| MONDI PLC | 06209386 | 16/05/2007 | 05/05/2011 | Silver |
| NATIONAL GAS TRANSMISSION HOLDINGS LIMITED | 03675375 | 12/11/2001 | 20/10/2002 | Amber |
| NATIONAL GAS TRANSMISSION PLC | 02006000 | 12/11/2001 | 20/10/2002 | Silver |
| PROLOGIS (STP) LIMITED | 02394556 | 08/07/2005 | 03/11/2006 | Amber |
| SEVERN TRENT (W&S) LIMITED | 03995023 | 14/12/2005 | 31/03/2007 | Amber |
| SEVERN TRENT CORPORATE HOLDINGS LIMITED | 04395566 | 14/12/2005 | 31/03/2007 | Dissolved |
| SEVERN TRENT HOLDINGS LIMITED | 05656363 | 30/03/2006 | 31/03/2007 | Bronze |
| SEVERN TRENT OVERSEAS HOLDINGS LIMITED | 02455508 | 14/12/2005 | 31/03/2007 | Silver |
| SEVERN TRENT PLC | 02366619 | 17/10/2003 | 02/10/2007 | Silver |
| SEVERN TRENT SERVICES HOLDINGS LIMITED | 04395572 | 14/12/2005 | 31/03/2007 | Bronze |
| SEVERN TRENT SERVICES INTERNATIONAL (OVERSEAS HOLDINGS) LIMITED | 03125131 | 14/12/2005 | 25/04/2007 | Amber |
| SEVERN TRENT WATER LIMITED | 02366686 | 20/09/2004 | 02/10/2007 | Silver |
| Weyside Investments Ltd | 05026900 | 27/01/2004 | 30/06/2004 | Dissolved |