| Name | Company Number | Date Appointed | Rating |
|---|
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ANDREW BURGESS (LIFTING GEAR) LIMITED | 01377257 | 15/04/2004 | 19/02/2010 | Dissolved |
| FIRST INTEGRATED SOLUTIONS LIMITED | SC179852 | 28/02/2013 | 24/12/2014 | Gold |
| GREAT CENTRAL RAILWAY DEVELOPMENT LTD | 07359237 | 16/10/2019 | 30/04/2023 | Bronze |
| GREAT CENTRAL RAILWAY PLC | 01257394 | 23/08/2017 | 13/03/2023 | One Red Flag |
| LIQUICO JHCL LIMITED | 02456204 | 01/04/1994 | 31/07/1995 | Dissolved |
| NORDIC TRACTION UK HOLDING LIMITED | 03281240 | 15/04/2004 | 19/02/2010 | Dissolved |
| THE CROSBY GROUP UK LIMITED | 01169996 | 15/04/2004 | 19/02/2010 | Bronze |
| THE KENNEDY GROUP LIMITED | 01622398 | 01/09/1995 | 04/06/2000 | Dissolved |
| W.H. SCOTT & SON (ENGINEERS) LIMITED | NI014026 | 14/04/2004 | 31/08/2010 | Amber |