Channel 4 is a British free-to-air public-service television network. Its headquarters are in London, with a national headquarters in Leeds and creative hubs in Glasgow and Bristol.

The channel was established to provide a fourth television service to the United Kingdom in addition to the licence-funded BBC One and BBC Two, and the single commercial broadcasting network ITV.

It began transmission on 2 November 1982, the day after Welsh language broadcaster S4C’s launch. Although largely commercially self-funded, it is ultimately publicly owned; originally a subsidiary of the Independent Broadcasting Authority (IBA), the station is now owned and operated by Channel Four Television Corporation, a public corporation of the Department for Digital, Culture, Media and Sport, which was established in 1990 and came into operation in 1993. In 2010, Channel 4 extended service into Wales and became a UK-wide television channel.