This is a list of British television related events from 1955.
Events
January
January – First televised Welsh language play, Cap Wil Tomos. 2 January – Annette Mills, host of Muffin the Mule, makes her last appearance on television. 10 January – Annette Mills dies from a heart attack after an operation. Following her death, Muffin the Mule is dropped by the BBC Television Service. 15 January The Benny Hill Show premieres on the BBC Television Service, later moving to ITV. Its global audience figures will be counted in the billions. The BBC broadcasts Heinz Sielmann's pioneering nature documentary Zimmerleute des Waldes as Woodpecker at the behest of David Attenborough and presented by Peter Scott; it is repeated several times during the year. 16 January – Sooty gets his own TV series hosted by Harry Corbett.
February
No events.
March
No events.
April
8 April – The BBC broadcasts Billy Graham's All Scotland Crusade live from the Kelvin Hall in Glasgow. This has the second highest audience share at this time, after the Coronation.
May
May – A consortium of the initial four Independent Television broadcasting companies establishes ITN, which will provide ITV with its news service when it launches in September. 17 May – Sir Anthony Eden hosts a ground-breaking television election programme for the Conservative Party, the first broadcast of its type. The 30 minute programme features government ministers pitted against newspaper editors. 26–27 May – The BBC provides around 17 hours of results coverage of the 1955 United Kingdom general election. The BBC records the coverage for the first time but only around three hours still exists in the BBC archives.
June
29 June – Life with the Lyons, one of the first successful British sitcoms (starring British-domiciled American couple Ben Lyon and Bebe Daniels), premieres on the BBC Television Service, having previously been broadcast only on radio. It will later transfer to ITV.
July
9 July – Dixon of Dock Green premieres on the BBC Television Service. 21 July – The BBC brings into service its Divis transmitting station, its first permanent 405-line VHF Band I facility serving Northern Ireland, marking the launch of a television service for Northern Ireland; the 35 kW transmissions can also be readily received in much of the Republic of Ireland. 29 July – This Is Your Life premieres on the BBC Television Service.
August
No events.
September
2 September – Under the guidance of Dr. Humphry Osmond, his friend Christopher Mayhew MP ingests 400 mg of Mescaline hydrochloride and allows himself to be filmed as part of a Panorama special for BBC TV that is never broadcast. 4 September – Newsreaders appear "in vision" for the first time on BBC TV. 14 September – The highly popular and long-running children's show Crackerjack is broadcast for the very first time on BBC TV and hosted by Eamonn Andrews. 22 September – Commercial television starts in the UK, with the launch of ITV in London, Associated-Rediffusion on weekdays and Associated Television Network (ATV) at weekends, from Croydon transmitting station. The rest of the UK receive their ITV regions over the next seven years. Leslie Mitchell is the first announcer to be heard, the first advertisement shown is for Gibbs SR toothpaste. 24 September – The first edition of a new, live children's variety show Crackerjack is broadcast. 25 September – ATV's variety show Sunday Night at the London Palladium launches on ITV; tonight's edition is compered by Tommy Trinder with Gracie Fields and Guy Mitchell featuring; the programme initially runs until 1967. This evening also, ITV launches I Love Lucy on UK television. September – Barbara Mandell becomes Britain's first female newsreader, presenting the Midday News bulletin on ITV.
October
10 October – Alexandra Palace begins test transmissions of a 405-line colour television service. 22 October – Quatermass II sequel to 1953's The Quatermass Experiment, premieres on the BBC Television Service. It ends on 26 November.
November
No events.
December
25 December – After being on radio since 1932, the Royal Christmas Message is broadcast on British television for the first time, in sound only at 3pm. The first visual Christmas message is shown in 1957.
Undated
BICC construct North Hessary Tor transmitting station for the BBC on Dartmoor to bring television coverage to Devon. Fanny Cradock records the pilot for a long-running cookery series with the BBC.