OFCOM:

The independent regulator and competition authority for the UK communications industries.
http://www.ofcom.org.uk/

The Digital Television Group (DTG):

The DTG is the industry association for digital television in the UK.
http://www.dtg.org.uk/

Registered Digital Installer Licensing Body (RDI) :

The Registered Digital Installer Licensing Body (RDI-LB) is a Community Interest Company formed to raise the professional status of TV signal reception installers and the aerial reception industry as a whole.
http://www.rdi-lb.tv/

The Confederation of Aerial Industries Limited (CAI):

The CAI is a recognised trade body for the aerial and satellite industry. http://www.cai.org.uk/

Ricability:

Ricability is the trading name of the Research Institute for Consumer Affairs (RICA). It is a national research charity dedicated to providing independent information of value to disabled and older consumers
www.ricability-digitaltv.org.uk

Digital Multiplex Operators Limited (DMOL):

http://www.dmol.co.uk/

Intellect:

Intellect is the manufacturer trade association for the UK technology industry.
http://www.intellectuk.org/