Television broadcasting in the UK began in 1936 as a public service without advertising. It has since expanded to include both free-to-air and subscription services across various distribution platforms. There are over 27,000 hours of domestic content produced annually at a cost of £2.6 billion. Major national broadcasters include BBC, ITV, Channel 4 and Channel 5, while local broadcasters serve specific regions of the UK. Commercial broadcasters rely on advertising revenue, which depends on viewer numbers, while the BBC is publicly funded through an annual license fee.