BSkyB
Channel Four Television
Digital Cinema Media (DCM)
Data Publishers Association (DPA)
Direct Marketing Association (UK) Ltd (DMA)
Direct Selling Association (DSA)
Discovery Communications Europe
Five
GMTV
Institute of Practitioners in Advertising (IPA)
Institute of Sales Promotion
Internet Advertising Bureau (UK) (IAB)
ISBA
ITV plc
Marketing Communication Consultants Association (MCCA)
MRS (Market Research Society)
Newspaper Publishers Association (NPA)
Newspaper Society (NS)
Outdoor Advertising Association of Great Britain (OAA)
Periodical Publishers Association (PPA)
Point-of-Purchase Advertising International
RadioCentre
Royal Mail
Satellite and Cable Broadcasters' Group (SCBG)
Scottish Newspaper Publishers Association (SNPA)
Viacom
Virgin Media Television
Yell (Yellow Pages)