| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| MAJOR PROJECTS ASSOCIATION | 02157656 | 29/11/2021 | Gold |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ABERDEEN INTERNATIONAL AIRPORT LIMITED | SC096622 | 08/10/2012 | 18/12/2014 | Gold |
| AGS AIRPORTS HOLDINGS LIMITED | 09242376 | 23/09/2021 | 28/01/2025 | One Red Flag |
| AGS AIRPORTS INVESTMENTS LIMITED | 09233296 | 23/09/2021 | 28/01/2025 | Silver |
| AGS AIRPORTS LIMITED | 09201991 | 23/09/2021 | 28/01/2025 | One Red Flag |
| AIRPORT HOLDINGS NDH1 LIMITED | 06408392 | 08/10/2012 | 18/12/2014 | Amber |
| BAA INTERNATIONAL LIMITED | 02423041 | 04/11/2013 | 12/08/2014 | Dissolved |
| DWR CYMRU (HOLDINGS) LIMITED | 03954867 | 01/01/2006 | 31/07/2006 | Silver |
| DWR CYMRU CYFYNGEDIG | 02366777 | 12/09/2005 | 31/07/2006 | Amber |
| EDINBURGH AIRPORT LIMITED | SC096623 | 01/09/2011 | 31/05/2012 | Silver |
| GLAS CYMRU (SECURITIES) CYFYNGEDIG | 04129132 | 01/01/2006 | 31/07/2006 | Silver |
| GLAS CYMRU ANGHYFYNGEDIG | 03975719 | 09/12/2005 | 31/07/2006 | Bronze |
| GLASGOW AIRPORT LIMITED | SC096624 | 08/10/2012 | 18/12/2014 | Gold |
| HEATHROW AIRPORT LIMITED | 01991017 | 12/08/2014 | 31/12/2014 | Silver |
| LHR AIRPORTS LIMITED | 01970855 | 08/10/2012 | 12/08/2014 | Silver |
| LHR BUILDING CONTROL SERVICES LIMITED | 03316215 | 12/08/2014 | 31/12/2014 | Silver |
| NATIONAL GAS TRANSMISSION PLC | 02006000 | 21/10/2002 | 31/07/2005 | Silver |
| NATIONAL HIGHWAYS LIMITED | 09346363 | 01/07/2015 | 31/01/2021 | Amber |
| NON DES TOPCO LIMITED | 06636117 | 08/10/2012 | 31/12/2014 | Dissolved |
| NORTHERN GAS NETWORKS LIMITED | 05167070 | 27/08/2004 | 31/05/2005 | Silver |
| SCOTLAND GAS NETWORKS PLC | SC264065 | 27/08/2004 | 01/06/2005 | Silver |
| SCOTTISH AIRPORTS LIMITED | SC096637 | 08/10/2012 | 12/08/2014 | Dissolved |
| SOUTHAMPTON INTERNATIONAL AIRPORT LIMITED | 02431858 | 08/10/2012 | 18/12/2014 | Amber |
| SOUTHERN GAS NETWORKS PLC | 05167021 | 27/08/2004 | 01/06/2005 | Bronze |
| STANSTED AIRPORT LIMITED | 01990920 | 08/10/2012 | 28/02/2013 | Silver |
| WALES & WEST UTILITIES LIMITED | 05046791 | 27/08/2004 | 01/06/2005 | Silver |
| WELSH WATER UTILITIES FINANCE PLC | 02869784 | 01/01/2006 | 31/07/2006 | Dissolved |
| WPD MIDLANDS PROPERTIES LIMITED | 03600545 | 30/03/2010 | 01/04/2011 | Dissolved |