| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| AB 2014 LIMITED | 09118661 | 07/07/2014 | Silver |
| NETWORK RAIL CP FINANCE LIMITED | 04776215 | 26/05/2011 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| CARILLION INTEGRATED SERVICES LIMITED | 03679838 | 24/03/2004 | 13/07/2007 | Insolvent |
| CCURV (NOMINEE) LIMITED | 06733137 | 19/11/2008 | 23/12/2008 | Dissolved |
| EDUCATION SUPPORT (ENFIELD 2) HOLDINGS LIMITED | 04401861 | 05/05/2004 | 12/12/2008 | Silver |
| EDUCATION SUPPORT (ENFIELD 2) LIMITED | 04420821 | 05/05/2004 | 12/12/2008 | Silver |
| EDUCATION SUPPORT (NEWHAM) HOLDINGS LIMITED | 04420844 | 05/05/2004 | 12/12/2008 | Silver |
| EDUCATION SUPPORT (NEWHAM) LIMITED | 04420816 | 05/05/2004 | 12/12/2008 | Silver |
| EDUCATION SUPPORT (SOUTHEND) LIMITED | 04114185 | 05/05/2004 | 26/01/2009 | Dissolved |
| EDUCATION SUPPORT (SWINDON) HOLDINGS LIMITED | 05172078 | 06/09/2004 | 08/11/2005 | Bronze |
| EDUCATION SUPPORT (SWINDON) LIMITED | 05172011 | 06/09/2004 | 08/11/2005 | Silver |
| HEALTHCARE SUPPORT (NEWHAM) HOLDINGS LIMITED | 03977135 | 18/02/2004 | 18/11/2005 | Silver |
| HEALTHCARE SUPPORT (NEWHAM) LIMITED | 03977157 | 10/02/2004 | 18/11/2005 | Silver |
| INTEQ SERVICES (HOLDINGS) LTD | 06555665 | 04/04/2008 | 02/09/2008 | Bronze |
| INTEQ SERVICES LTD. | 06554511 | 03/04/2008 | 02/09/2008 | Bronze |
| JOHN LAING INVESTMENTS LIMITED | 00780225 | 01/09/2007 | 31/01/2008 | Bronze |
| JOHN LAING PROJECTS & DEVELOPMENTS (HOLDINGS) LIMITED | 04252518 | 01/12/2007 | 31/12/2008 | Gold |
| JOHN LAING PROJECTS & DEVELOPMENTS LIMITED | 04420886 | 01/12/2007 | 31/12/2008 | Bronze |
| JOHN LAING SOCIAL INFRASTRUCTURE LIMITED | 03576132 | 24/11/2003 | 11/12/2007 | Dissolved |
| LAING INVESTMENTS GREENWICH LIMITED | 03074537 | 15/03/2006 | 13/01/2009 | Dissolved |
| MERIDIAN HOSPITAL COMPANY (HOLDINGS) LIMITED | 03462656 | 01/12/2005 | 12/12/2008 | Silver |
| MERIDIAN HOSPITAL COMPANY PLC | 03462569 | 01/12/2005 | 12/12/2008 | Silver |
| MODUS SERVICES (HOLDINGS) LIMITED | 03871198 | 29/02/2008 | 12/12/2008 | Amber |
| MODUS SERVICES LIMITED | 03902894 | 29/02/2008 | 12/12/2008 | Amber |
| NETWORK RAIL INFRASTRUCTURE FINANCE PLC | 05090412 | 26/05/2011 | 12/06/2014 | Silver |
| NETWORK RAIL MTN FINANCE LIMITED | 04864307 | 26/05/2011 | 12/06/2014 | Gold |
| PRIME CARE SOLUTIONS (KINGSTON) HOLDINGS LIMITED | 05001794 | 23/11/2004 | 11/08/2005 | Insolvent |
| PRIME CARE SOLUTIONS (KINGSTON) LIMITED | 04794356 | 23/11/2004 | 11/08/2005 | Insolvent |
| SERVICES SUPPORT (SEL) HOLDINGS LIMITED | 03912708 | 27/01/2004 | 16/12/2004 | Silver |
| SERVICES SUPPORT (SEL) LIMITED | 03679825 | 27/01/2004 | 16/12/2004 | Silver |
| WSMR (HOLDINGS) LIMITED | 05970324 | 05/06/2008 | 05/12/2008 | Not Trading |