| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| Deltamart Ltd | 03076658 | 06/07/1995 | Dissolved |
| Deltamart Ltd | 03076658 | 06/07/1995 | Dissolved |
| WDG LIMITED | 02620318 | 15/08/1993 | Silver |
| WDG RESEARCH LLP | OC333280 | 02/12/2007 | Bronze |
| Watford World of Golf Ltd | 02480254 | 26/02/1993 | Dissolved |
| Wdg Optimise Ltd | 05919111 | 30/08/2006 | Dissolved |
| Westhaven Services Ltd | 02494585 | 20/04/1992 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| I2IDEAS LIMITED | 06561793 | 10/04/2008 | 18/03/2016 | Bronze |
| The British Market Research Association Ltd | 03419017 | 01/01/2005 | 26/07/2006 | Dissolved |
| WDG LIMITED | 02620318 | 14/06/1991 | 23/04/1997 | Silver |
| Winstanley Douglas & Grantham Ltd | 02814596 | 04/05/1993 | 05/04/1999 | Dissolved |
| Winstanley Research Ltd | 02606989 | 01/11/1993 | 01/09/1996 | Dissolved |