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Post Office Research Station

The former Post Office Research Station

The Post Office Research Station at Dollis Hill, north west London, was first established in 1925 and opened by Prime Minister Ramsay MacDonald in 1933.[1]

In 1943 the world's first programmable electronic computer, Colossus Mark 1 was built by Tommy Flowers and his team, followed in 1944 and 1945 by nine Colossus Mark 2s. These were used at Bletchley Park in Cryptanalysis of the Lorenz cipher.

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 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 in Suffolk. This was formally opened on 21 November 1975 by Queen Elizabeth and is today known as Adastral Park.

The old Dollis Hill site was released for housing, with the main building converted into a block of luxury flats and an access road named Flowers Close, in honour of Tommy Flowers. Much of the rest of the site contains affordable housing administered by Network Housing.

Paddock, a World War II concrete two-level underground bunker, was built in secret in 1939 as an alternative Cabinet War Room underneath a corner of the Dollis Hill site. Its surface building was demolished after the war.

Notable staffEdit


  1. ^ "October 1933: The Post Office Research Station". The Engineer. Retrieved 24 August 2017. 

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