| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| THE BRITISH ROTOTHERM COMPANY LIMITED | 02570730 | 12/10/2010 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| A.E.S. ENGINEERING LIMITED | 00392743 | 23/10/2006 | 31/08/2016 | Gold |
| AESSEAL PLC | 02101607 | 01/01/2003 | 09/03/2009 | Gold |
| AKTRION GROUP LIMITED | 03936590 | 27/02/2004 | 02/12/2004 | Bronze |
| AKTRION MANUFACTURING SUPPORT SERVICES LIMITED | 03458202 | 01/04/2003 | 02/12/2004 | Gold |
| BOREAL & AUSTRAL RAILFREIGHT LIMITED | 03164272 | 29/07/2005 | 13/11/2007 | Dissolved |
| DB CARGO (UK) HOLDINGS LIMITED | 03116322 | 29/07/2005 | 13/11/2007 | Bronze |
| DB CARGO (UK) LIMITED | 02938988 | 29/07/2005 | 13/11/2007 | Silver |
| DB CARGO COMPONENTS LIMITED | 05431283 | 29/07/2005 | 13/11/2007 | Dissolved |
| DB CARGO INFORMATION SERVICES LIMITED | 03341510 | 29/07/2005 | 13/11/2007 | Gold |
| DB CARGO INTERNATIONAL LIMITED | 03232475 | 29/07/2005 | 13/11/2007 | Gold |
| EAST & WEST RAILWAY LIMITED | 03180966 | 29/07/2005 | 13/11/2007 | Dissolved |
| ENGINEERING SUPPORT GROUP LIMITED | 03038421 | 29/07/2005 | 13/11/2007 | Bronze |
| EXTEC DISTRIBUTORS LIMITED | 02311879 | 11/12/2002 | 28/02/2003 | Dissolved |
| EXTEC GLOBAL LIMITED | 04545074 | 14/11/2002 | 28/02/2003 | Dissolved |
| EXTEC HOLDINGS LIMITED | 04545695 | 13/11/2002 | 28/02/2003 | Dissolved |
| EXTEC INDUSTRIES LIMITED | 02073959 | 11/12/2002 | 28/02/2003 | Dissolved |
| FPS DISTRIBUTION LIMITED | 04169831 | 01/06/2001 | 21/07/2004 | Gold |
| HOLT LLOYD GROUP LIMITED | 02918147 | 14/11/1997 | 27/08/1999 | Amber |
| HYVA (U.K.) LIMITED | 01660167 | 05/02/2004 | 01/12/2006 | One Red Flag |
| LOADHAUL LIMITED | 02938985 | 29/07/2005 | 13/11/2007 | Dissolved |
| LOCOMOTIVE 6667 LIMITED | 03600386 | 29/07/2005 | 13/11/2007 | Gold |
| MAINLINE FREIGHT LIMITED | 02938986 | 29/07/2005 | 13/11/2007 | Dissolved |
| NEW LOCOMOTIVE FINANCE LIMITED | 03161152 | 29/07/2005 | 13/11/2007 | Dissolved |
| OLAER GROUP LIMITED | 05523506 | 23/08/2007 | 02/07/2012 | Silver |
| RAIL EXPRESS SYSTEMS LIMITED | 02938991 | 29/07/2005 | 13/11/2007 | Gold |
| RAILWAY APPROVALS LIMITED | 03038420 | 29/07/2005 | 13/11/2007 | Gold |
| RAILWAY INVESTMENTS LIMITED | 05276081 | 29/07/2005 | 13/11/2007 | Dissolved |
| RES DECEMBER LIMITED | 03134604 | 29/07/2005 | 13/11/2007 | Dissolved |
| Roulunds (Uk) Ltd | 03206190 | 01/01/1999 | 01/03/2001 | Dissolved |
| SHEFFIELD GEAR AND ENGINEERING CO. LIMITED | 01075147 | 11/12/2002 | 28/02/2003 | Dissolved |
| Shs Investments Ltd | 02539042 | 01/12/1996 | 31/12/1998 | Dissolved |