| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| BIOFLAME LIMITED | 04188365 | 05/01/2009 | Dissolved |
| BIOMASS POWER PLANT LIMITED | 07783725 | 22/09/2011 | Dissolved |
| GMT MANUFACTURING LTD | 03276755 | 08/01/2016 | Dissolved |
| GMT TRACK PRODUCTS LIMITED | 09541348 | 08/01/2016 | Dissolved |
| HALLRAIL HOLDINGS LIMITED | 05939639 | 01/04/2011 | Dissolved |
| HALLRAIL LIMITED | 01288790 | 01/04/2011 | Dissolved |
| NEW HORIZONS APPRENTICES LIMITED | 07436688 | 11/11/2010 | Silver |
| PG 2014 LIMITED | 09351946 | 08/01/2016 | Dissolved |
| TRACKWORK GROUP LIMITED | 06552957 | 02/04/2008 | Silver |
| TRACKWORK HOLDINGS LIMITED | 02355491 | 29/01/1999 | Silver |
| TRACKWORK HOLDINGS LIMITED | 02355491 | 31/03/2000 | Silver |
| TRACKWORK INSTALLATIONS LIMITED | 01794128 | 29/01/1999 | Amber |
| TRACKWORK INSTALLATIONS LIMITED | 01794128 | 01/01/2004 | Amber |
| TRACKWORK LIMITED | 01271067 | 01/10/1997 | Silver |
| TRACKWORK MOLL LIMITED | 07654056 | 15/06/2011 | Bronze |
| TRACKWORK PLANT LIMITED | 09483631 | 11/03/2015 | Dissolved |
| TRACKWORK RESOURCES LIMITED | 01674400 | 29/01/1999 | Bronze |
| TRACKWORK RESOURCES LIMITED | 01674400 | 01/01/2004 | Bronze |
| TRACKWORK SERVICES LIMITED | 04548859 | 30/09/2002 | Dissolved |
| TRACKWORK SERVICES LIMITED | 04548859 | 30/09/2002 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| TRACKWORK LIMITED | 01271067 | 29/01/1999 | 02/02/2006 | Silver |