''Radiolympia'', also known as the Radio Show, was a pioneering exhibition of radio equipment, latterly television equipment, held annually at Olympia in London, England, in the 1920s to 1940s, except for a period of interruption during

World War II World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...

. The first such exhibition was held in 1926. On 26 August 1936, the first high-definition standard (Baird 240 lines) television transmission was made in a test by the

BBC The British Broadcasting Corporation (BBC) is a British public service broadcaster headquartered at Broadcasting House in London, England. Originally established in 1922 as the British Broadcasting Company, it evolved into its current sta ...

to the exhibition from the BBC's studios in Alexander Palace. The day after, the Marconi-EMI ( 405 lines) system was used. The record attendance was 238,000 in 1934.

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* {{Coord, 51, 29, 47, N, 0, 12, 35, W, region:GB_type:landmark, display=title History of radio History of television in the United Kingdom 1926 establishments in England Annual events in London