| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BALFOUR BEATTY RAIL INFRASTRUCTURE SERVICES LIMITED | 00772439 | 27/01/2006 | Not Trading |
| BALFOUR BEATTY RAIL INVESTMENTS LIMITED | 03048949 | 13/07/2009 | Dissolved |
| BALFOUR BEATTY RAIL LIMITED | 01982627 | 27/01/2006 | Not Trading |
| BALFOUR BEATTY RAIL TECHNOLOGIES LIMITED | 00235437 | 17/08/2009 | Not Trading |
| BALFOUR BEATTY RAIL TRACK SYSTEMS LIMITED | 02311350 | 17/08/2009 | Not Trading |
| DEAN & DYBALL RAIL LIMITED | 05503947 | 08/06/2010 | Dissolved |
| EDGAR ALLEN ENGINEERING LIMITED | 00898861 | 13/07/2009 | Insolvent |
| LASER RAIL LTD. | 02423114 | 17/08/2009 | Not Trading |
| NETWORK PLANT (MIDLANDS) LIMITED | 01253354 | 13/07/2009 | Dissolved |
| NETWORK PLANT LIMITED | 01126497 | 13/07/2009 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BALFOUR BEATTY RAIL CORPORATE SERVICES LIMITED | 03110383 | 27/01/2006 | 05/06/2009 | Not Trading |
| BALFOUR BEATTY RAIL PROJECTS LIMITED | 00772437 | 27/01/2006 | 01/12/2007 | Not Trading |
| BALFOUR BEATTY RAIL RESIDUARY LIMITED | SC006624 | 30/03/2006 | 01/12/2007 | Not Trading |
| BALFOUR BEATTY RAIL TECHNOLOGIES LIMITED | 00235437 | 27/01/2006 | 01/12/2007 | Not Trading |
| BALFOUR BEATTY RAIL TRACK SYSTEMS LIMITED | 02311350 | 27/01/2006 | 01/12/2007 | Not Trading |
| EASTERN INFRASTRUCTURE MAINTENANCE COMPANY LIMITED | 02995393 | 27/01/2006 | 01/12/2007 | Insolvent |
| EDGAR ALLEN ENGINEERING LIMITED | 00898861 | 30/03/2006 | 01/12/2007 | Insolvent |
| EIMCO LIMITED | 03159250 | 13/07/2009 | 13/07/2009 | Dissolved |
| LASER RAIL LTD. | 02423114 | 19/09/2007 | 01/12/2007 | Not Trading |
| SOUTH EAST INFRASTRUCTURE MAINTENANCE COMPANY LIMITED | 02995413 | 27/01/2006 | 01/12/2007 | Dissolved |
| SOUTHERN TRACK RENEWALS COMPANY LIMITED | 02995436 | 27/01/2006 | 01/12/2007 | Dissolved |