This is a list of events from British radio in 1920.

• January – The first informal and spasmodic broadcasts in the United Kingdom are made by the Marconi Company from Chelmsford in Essex. These broadcasts include both speech and music.^[1]
• 23 February–6 March – The Marconi Company broadcasts from Chelmsford a series of 30-minute shows repeated twice daily. These include live music performances.^[1]
• 15 June – Australian soprano Dame Nellie Melba becomes history's first well-known professional performer to make a radio broadcast when she sings two arias as part of the series of Marconi broadcasts from Chelmsford.^[1]
• November – The Marconi broadcasts from Chelmsford cease after it is claimed they interfere with aircraft and ship communications.^[1] They resume in 1922 regularly as 2MT.

• 5 February – Frank Muir, comedy writer (died 1998)
• 2 April – Ian Messiter, panel game creator (died 1999)
• 12 June – Peter Jones, comic actor (died 2000)
• 18 June – Ian Carmichael, actor (died 2010)
• 28 June – Irene Thomas, radio quiz show player (died 2001)
• 24 October – Steve Conway, singer (died 1952)^[2]