| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Digital Radio Marketing Bureau Ltd | 03987524 | 08/05/2000 | Dissolved |
| Digital Radio Plus Ltd | 04312596 | 23/05/2002 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| J F M G LIMITED | 03297317 | 02/11/2004 | 19/11/2008 | Amber |
| JICRIT LIMITED | 03460035 | 14/09/1998 | 20/09/2006 | Silver |
| JICRIT LIMITED | 03460035 | 14/09/1998 | 18/07/2006 | Silver |
| PREMIER CHRISTIAN MEDIA TRUST | 01743091 | 01/04/2000 | 04/03/2008 | Bronze |
| RADIO ACADEMY(THE) | 01978864 | 26/03/1997 | 21/04/2004 | Gold |
| RADIO JOINT AUDIENCE RESEARCH LIMITED | 02693823 | 01/04/1996 | 28/06/2006 | Bronze |
| RADIOCENTRE LIMITED | 02669040 | 11/04/2006 | 31/12/2008 | Bronze |
| SCREENSKILLS LIMITED | 02576828 | 05/03/2004 | 30/01/2009 | Gold |
| THE BROADCAST ADVERTISING STANDARDS BOARD OF FINANCE LIMITED | 05017678 | 16/01/2004 | 13/06/2006 | Silver |
| THE BROADCAST COMMITTEE OF ADVERTISING PRACTICE LIMITED | 05126412 | 12/05/2004 | 14/07/2006 | Not Trading |
| THE COMMERCIAL RADIO COMPANIES ASSOCIATION LIMITED | 01120214 | 24/07/1995 | 23/09/2008 | Dissolved |
| THE COMMERCIAL RADIO COMPANIES ASSOCIATION LIMITED | 01120214 | 24/07/1995 | 19/01/2009 | Dissolved |
| UK DIGITAL RADIO LIMITED | 04104532 | 20/11/2000 | 01/05/2001 | One Red Flag |