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The Post Office Research Station at Dollis Hill, London, was first established in 1921 and opened by Prime Minister Ramsay MacDonald in 1933.

In 1943, the world's first programmable electronic computer, Colossus Mark 1 was built by Tommy Flowers and his team, followed in 1944 by nine Colossus Mark 2s.

In 1957, ERNIE (Electronic Random Number Indicator Equipment) was built for the government's Premium Bond lottery, by Sidney Broadhurst's team.

In 1971, Samuel Fedida conceived of Viewdata and the Prestel service was launched in 1979.

In 1968, it was announced that the station would be relocated to a new centre to be built at Martlesham Heath. It was formally opened on 21 November 1975 by Queen Elizabeth and is today known as Adastral Park. The old site was released for housing, with the main building converted into a block of flats and an access road named Flowers Close, in honour of Tommy Flowers.

Paddock, a two storey World War II concrete citadel was built underneath the Dollis Hill site.

Notable staff

Coordinates: 51°33′42″N 0°14′18″W / 51.561629°N 0.238401°W / 51.561629; -0.238401


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