| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ALAN DICK COMMUNICATIONS LIMITED | 07780713 | 06/02/2023 | One Red Flag |
| CRAIG SCOTT CONSULTING LTD | 14510000 | 28/11/2022 | Dissolved |
| GEMINI RAIL SERVICES UK LTD | 08656105 | 06/02/2023 | One Red Flag |
| IPS COMMUNICATIONS LIMITED | 09177405 | 06/02/2023 | One Red Flag |
| RAIL ORDER LIMITED | 08383442 | 06/02/2023 | Silver |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| GENII ENGINEERING & TECHNOLOGY TRAINING LIMITED | 03804696 | 28/10/2010 | 12/05/2017 | Bronze |
| NUCLEUS TRAINING LIMITED | 05698334 | 28/10/2010 | 04/03/2014 | Dissolved |
| SLBE LIMITED | 10664034 | 10/03/2017 | 09/08/2017 | Dissolved |
| SYSTRA LIMITED | 03383212 | 01/04/2020 | 31/12/2022 | Bronze |
| TSP PROJECTS LIMITED | 03033290 | 22/05/2006 | 31/12/2022 | Not Trading |
| VOLKERRAIL GROUP LIMITED | 04930080 | 19/07/2006 | 26/11/2008 | Bronze |