| Name | Company Number | Date Appointed | Rating |
|---|---|---|---|
| British Market Research Society Ltd | 03969098 | 01/01/2005 | Dissolved |
| C S W RESEARCH LIMITED | 02368162 | 31/01/2008 | Dissolved |
| EURO FIELDWORK LIMITED | 01524475 | 31/01/2008 | Dissolved |
| Global Teamwork Limited | 02563725 | 29/11/1992 | Dissolved |
| I J K Fieldwork International Ltd | 02348327 | 06/11/1991 | Dissolved |
| I J K Survey Research Associates Ltd | 02292083 | 02/11/1992 | Dissolved |
| N O P Market Research Ltd | 02375538 | 02/11/1992 | Dissolved |
| Nop Internet Exchange Ltd | 03847682 | 23/12/1999 | Dissolved |
| The British Market Research Association Ltd | 03419017 | 01/01/2005 | Dissolved |
| Name | Company Number | Date Appointed | Date Resigned | Rating |
|---|---|---|---|---|
| ASSOCIATED GLOBAL MARKET RESEARCH LTD. | 00874424 | 01/10/1992 | 31/07/2005 | Gold |
| ASSOCIATED GLOBAL MARKET RESEARCH LTD. | 00874424 | 02/11/1992 | 31/07/2005 | Gold |
| BDRC CONTINENTAL LIMITED | 02578457 | 04/08/2006 | 16/05/2023 | Bronze |
| BDRC GROUP LIMITED | 06779754 | 23/12/2008 | 06/01/2023 | Bronze |
| Bdi Research Ltd | 02079055 | 01/07/1997 | 29/01/2002 | Dissolved |
| Bem Ltd | 03061489 | 01/07/1997 | 29/01/2002 | Dissolved |
| Berry Phillips & Doyle Ltd | 02599052 | 23/08/1996 | 05/02/1999 | Dissolved |
| E.S.A. (MARKET RESEARCH) LIMITED | 01422179 | 11/05/2012 | 30/06/2024 | Gold |
| FLACKETT, STEVENS AND ASSOCIATES LIMITED | 02350085 | 14/01/1994 | 31/03/2005 | Dissolved |
| GFK FIELD INTERVIEWING SERVICES UK LIMITED | 03105571 | 22/09/1995 | 29/01/2002 | Dissolved |
| GFK SHARED SERVICES UK LIMITED | 03190837 | 23/05/1996 | 29/01/2002 | Dissolved |
| GFK TELEPHONE INTERVIEWING SERVICES UK LIMITED | 03180166 | 23/05/1996 | 29/01/2002 | Dissolved |
| GFK U.K. LIMITED | 02512551 | 02/11/1992 | 03/09/2007 | Silver |
| Ggc-Nop Ltd | 03403987 | 09/10/1997 | 29/01/2002 | Dissolved |
| ICOMMS MEDIA GROUP LIMITED | 03967770 | 25/04/2000 | 09/02/2001 | Dissolved |
| IPSOS MYSTERY SHOPPING SERVICES UK LIMITED | 03190828 | 22/05/1996 | 29/01/2002 | Dissolved |
| MARKET RESEARCH SOCIETY(THE) | 00518685 | 01/04/2002 | 30/11/2002 | Silver |
| MIL RESEARCH GROUP LIMITED | 00471008 | 06/12/1996 | 10/12/1996 | Dissolved |
| Mediametrics Ltd | 02764699 | 04/04/1997 | 29/01/2002 | Dissolved |
| NUMBERS SERVICES LIMITED | 01986188 | 04/04/1997 | 29/01/2002 | Dissolved |
| Nop Consumer Market Research Ltd | 01792623 | 14/04/2000 | 29/01/2002 | Dissolved |
| Nop Market Research Ltd | 00801975 | 14/04/2000 | 29/01/2002 | Dissolved |
| Nop Mystery Shopping Ltd | 01792624 | 14/04/2000 | 29/01/2002 | Dissolved |
| Nop Surveymaster Ltd | 03849252 | 10/11/1999 | 29/01/2002 | Dissolved |
| Numbers Data Processing Ltd | 02375599 | 04/04/1997 | 29/01/2002 | Dissolved |
| Numbers Market Research Ltd | 01992719 | 04/04/1997 | 29/01/2002 | Dissolved |
| PERSPECTIVE RESEARCH SERVICES LIMITED | 03717257 | 21/07/2011 | 30/06/2024 | Gold |
| Radio Research Ltd | 01802150 | 14/04/2000 | 29/01/2002 | Dissolved |
| SPARK FIELD SOLUTIONS LIMITED | 01425948 | 14/04/2000 | 29/01/2002 | Dissolved |
| The British Market Research Association Ltd | 03419017 | 03/02/1999 | 31/12/2002 | Dissolved |
| UNITED TRUSTEES LIMITED | 02113253 | 11/12/2006 | 18/05/2010 | Not Trading |
| VARIETY, THE CHILDREN'S CHARITY | 00509811 | 01/01/2002 | 01/01/2003 | Silver |