| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| CORUN CONSULTING ENGINEERS LIMITED | 07057824 | 24/10/2013 | Dissolved |
| DIVERTED TRAFFIC LIMITED | 07058256 | 24/12/2013 | Dissolved |
| HIGHWAYS (UK) LIMITED | 07502103 | 01/04/2012 | Gold |
| PINNACLE TRANSPORTATION LIMITED | 07775702 | 15/09/2011 | Dissolved |
| RED AMBER GREEN (HOLDINGS) LIMITED | 06011592 | 12/03/2007 | One Red Flag |
| Rupert Lyons & Co Ltd | 03885538 | 24/11/1999 | Dissolved |
| TRANSPORT PLANNING ASSOCIATES LIMITED | 03476060 | 28/11/1997 | Bronze |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| BISHOP'S HATFIELD GIRLS' SCHOOL | 07831507 | 31/10/2016 | 22/07/2019 | Silver |
| CHANNELS OMNIBUS LIMITED | 10304267 | 01/08/2016 | 18/04/2023 | Dissolved |
| DANESBURY PARK MANAGEMENT (MEWS) LIMITED | 03603931 | 03/02/2010 | 31/12/2016 | Silver |
| GREEN BLUE GREY LIMITED | 10299023 | 27/07/2016 | 01/07/2023 | Dissolved |
| PCC TRAFFIC INFORMATION CONSULTANCY LIMITED | 05812205 | 10/05/2006 | 30/04/2019 | Bronze |
| PCCTIC HOLDINGS LIMITED | 08190112 | 23/08/2012 | 27/03/2019 | Silver |
| TRAVEL PLAN COORDINATION LIMITED | 06115001 | 07/08/2007 | 23/06/2009 | Dissolved |