| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| A.D. Roche Associates Ltd | 04495376 | 25/07/2002 | Dissolved |
| ADR RAIL LIMITED | 06907746 | 18/05/2009 | Insolvent |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| A B B Daimler-Benz Transportation (Customer Support Chart Le | 02968614 | 09/01/1995 | 05/06/1995 | Dissolved |
| ABB DAIMLER-BENZ TRANSPORTATION (CUSTOMER SUPPORT DONCASTER) LIMITED | 02968560 | 09/01/1995 | 05/06/1995 | Dissolved |
| ABB DAIMLER-BENZ TRANSPORTATION (CUSTOMER SUPPORT ILFORD) LIMITED | 02968495 | 09/01/1995 | 05/06/1995 | Dissolved |
| ATKINSRÉALIS RAIL & TRANSIT LIMITED | 03062722 | 13/11/1995 | 17/11/1995 | Silver |
| BARABAS LIMITED | 03294014 | 12/12/1996 | 31/01/1997 | Not Trading |
| BOMBARDIER TRANSPORTATION (GAUTRAIN) UK LIMITED | 03138093 | 12/12/1995 | 04/01/1996 | Dissolved |
| BOMBARDIER TRANSPORTATION (SIGNAL) UK LTD | 03062720 | 13/11/1995 | 17/11/1995 | Dissolved |
| BR BUSINESS SYSTEMS LIMITED | 03222541 | 04/07/1996 | 31/01/1997 | Not Trading |
| British Rail Maintenance Ltd | 02089282 | 22/06/1992 | 12/02/1997 | Dissolved |
| CARNELIAN LIMITED | 03288677 | 02/12/1996 | 14/02/1997 | Dissolved |
| CPCS TRANSCOM UK LTD | 02897318 | 01/04/2000 | 28/09/2012 | One Red Flag |
| ENGINEERS AGAINST POVERTY | 03613056 | 09/09/1998 | 19/07/2000 | Amber |
| GRESTY ROAD 2005 HOLDINGS LIMITED | 03227242 | 01/05/2002 | 07/12/2004 | Dissolved |
| GRESTY ROAD 2005 LIMITED | 03294015 | 12/12/1996 | 31/01/1997 | Dissolved |
| Glasgow Rail Maintenance Ltd | 02968607 | 09/01/1995 | 06/06/1995 | Dissolved |
| HARDY TRAINCARE LTD | 02968562 | 09/01/1995 | 07/06/1995 | Dissolved |
| HSBC RAIL (UK) LIMITED | 02912638 | 21/03/1994 | 20/07/1994 | Dissolved |
| LANDITTON LTD | 03095445 | 22/08/1995 | 01/09/1995 | Dissolved |
| Laputa Enterprises Ltd | 03294013 | 12/12/1996 | 20/12/1996 | Dissolved |
| NETWORK TRAIN ENGINEERING SERVICES LIMITED | 03062723 | 13/11/1995 | 17/11/1995 | Dissolved |
| NEW SOUTHERN RAILWAY LIMITED | 03010919 | 13/02/1995 | 26/05/1996 | Gold |
| OCCUPATIONAL HEALTH CARE LIMITED | 03062724 | 13/11/1995 | 17/11/1995 | Bronze |
| OPAL ENGINEERING LIMITED | 03204631 | 23/05/1996 | 14/02/1997 | Dissolved |
| PROFESSIONAL ENGINEERING PROJECTS LIMITED | 01103638 | 07/06/1995 | 06/06/2001 | Amber |
| RAILPART (UK) LIMITED | 03294017 | 12/12/1996 | 06/03/1997 | Not Trading |
| RAILWAY DOCUMENTATION AND DRAWING SERVICES LIMITED | 03128142 | 01/02/1996 | 23/07/1998 | Gold |
| Railtest Operations Ltd | 03318555 | 10/02/1997 | 14/02/1997 | Dissolved |
| SCIENTIA FERROVIA LIMITED | 03288679 | 02/12/1996 | 09/12/1996 | Dissolved |
| SCIENTIFICS LIMITED | 03204613 | 23/05/1996 | 09/12/1996 | Not Trading |
| Scuk (No. 2) Ltd | 03132436 | 27/11/1995 | 01/12/1995 | Dissolved |
| Signalling Control U.K. Ltd | 03062719 | 13/11/1995 | 17/11/1995 | Dissolved |
| THALES TRANSPORT AND SECURITY LIMITED | 03132438 | 27/11/1995 | 21/12/1995 | Amber |
| THAMES TRAINS LIMITED | 03007943 | 29/05/1996 | 13/10/1996 | Not Trading |
| THAMESLINK RAIL LIMITED | 03013232 | 29/05/1996 | 02/03/1997 | Strike Off |
| THE A1 STEAM LOCOMOTIVE TRUST | 02636924 | 09/03/2002 | 03/06/2003 | Silver |
| TORNADO STEAM TRACTION LIMITED | 04336467 | 13/07/2002 | 03/06/2003 | One Red Flag |
| The Engineering Link Ltd | 03062725 | 13/11/1995 | 17/11/1995 | Dissolved |
| The Locomotive Construction Co Ltd | 02804804 | 13/07/2002 | 03/06/2003 | Dissolved |
| UNIPART RAIL LIMITED | 03038418 | 31/05/1995 | 06/03/1997 | Gold |
| Wolverton Rail Maintenance Ltd | 02968584 | 09/01/1995 | 06/06/1995 | Dissolved |