| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| ELECTRIC RAILWAY MUSEUM LIMITED | 06237761 | 16/05/2014 | Dissolved |
| IAN BROWN RAIL LIMITED | 07619195 | 03/05/2011 | Dissolved |
| RAILFUTURE LTD | 05011634 | 12/05/2018 | Gold |
| RAILWATCH LIMITED | 07949602 | 12/05/2018 | Amber |
| RDS 2018 LTD | 04265306 | 12/05/2018 | Dissolved |
| THE BRIGHTON BELLE TRAIN LIMITED | 09744645 | 12/04/2016 | Not Trading |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ABELLIO GREATER ANGLIA LTD | 06428369 | 29/11/2011 | 15/10/2016 | Dissolved |
| CROSSRAIL LIMITED | 04212657 | 01/04/2011 | 30/09/2014 | Gold |
| DOCKLANDS LIGHT RAILWAY LIMITED | 02052677 | 07/03/1997 | 05/11/2010 | Bronze |
| GREENWICH THEATRE LIMITED(THE) | 00860847 | 30/11/1999 | 28/03/2022 | Amber |
| KING GEORGE STREET PROPERTY MANAGEMENT LIMITED | 05407142 | 01/01/2012 | 14/01/2016 | Amber |
| MONTAGE THEATRE ARTS | 05020947 | 05/10/2012 | 01/04/2018 | Silver |
| RAIL FOR LONDON LIMITED | 05965930 | 07/02/2007 | 05/11/2010 | Bronze |
| RAILFUTURE LTD | 05011634 | 10/05/2014 | 20/05/2017 | Gold |
| RAILWATCH LIMITED | 07949602 | 10/05/2014 | 20/05/2017 | Amber |
| RDS 2018 LTD | 04265306 | 10/05/2014 | 20/05/2017 | Dissolved |
| TRAMTRACK CROYDON LIMITED | 03092613 | 26/06/2008 | 05/11/2010 | Amber |
| TRAMTRACK LEASE FINANCING LIMITED | 04439273 | 26/06/2008 | 05/11/2010 | Dissolved |
| TRAMTRACK LEASING LIMITED | 03255005 | 26/06/2008 | 05/11/2010 | Dissolved |
| TRANSPORT TRADING LIMITED | 03914810 | 17/07/2001 | 05/11/2010 | Silver |
| TRANSPORT UK (OPERATIONS) LIMITED | 05618463 | 01/05/2011 | 01/01/2014 | Amber |
| UKTRAM LIMITED | 05554196 | 08/12/2015 | 16/07/2018 | Silver |