| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| D&TN LTD | 12588178 | 06/05/2020 | Gold |
| GRAYS OF CAMBRIDGE (INTERNATIONAL) LIMITED | 00148700 | 23/05/2018 | Gold |
| GREAT BRITISH RAILWAYS TRANSITION TEAM LIMITED | 14066335 | 01/09/2022 | Amber |
| INTERNATIONAL AIRPORT BIDCO LIMITED | 10829828 | 23/03/2023 | Silver |
| NETWORK RAIL INFRASTRUCTURE LIMITED | 02904587 | 06/07/2018 | Bronze |
| NETWORK RAIL LIMITED | 04402220 | 06/07/2018 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| LONDON LUTON AIRPORT OPERATIONS LIMITED | 03491213 | 24/06/2020 | 01/04/2023 | Silver |