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Channel 4 is a British public-service television broadcaster which began transmission on 2 November 1982. Although largely commercially self-funded, it is ultimately publicly owned; originally a subsidiary of the Independent Broadcasting Authority, the station is now owned and operated by Channel Four Television Corporation, a public body established in 1990, coming into operation in 1993. With the conversion of the Wenvoe transmitter group in Wales to digital on 31 March 2010, Channel 4 became an entirely UK-wide TV channel for the first time. The channel was established to provide a fourth television service to the United Kingdom in addition to the television licence-funded BBC's two services and the single commercial broadcasting network, ITV. In 2013 the channel hosted the Grand National for the first time, taking over from BBC One. This provided an influx of viewers with a peak of 8.9 million, one of the channel's highest viewing figures. (via Freebase)