John Ashworth Ratcliffe (1902-1987) - "jar" - influential British Radio-Physicist. (Several sources mis-spell as Radcliffe)

He and his Cambridge University group did much pioneering work on the ionosphere, immediately prior to WW2. He was one of many leading radio scientists who worked at the Telecommunications Research Establishment during WW2. Martin Ryle, Bernard Lovell and Anthony Hewish were co-workers there, and Ryle and Hewish joined his radio-physics group at Cambridge after WW2. The University of Cambridge is the second-oldest university in the English-speaking world (after Oxford). ... The Telecommunications Research Establishment (TRE) was established in Malvern, England in 1940 as the central research group for RAF applications of radar. ... Sir Martin Ryle (September 27, 1918 – October 14, 1984) was a British radio astronomer who developed revolutionary radio telescope systems (see e. ... Bernard Lovell (born 1913) is a British radio astronomer, director (until 1981) of the Jodrell Bank Observatory. ... Antony Hewish (born Fowey, Cornwall, May 11, 1924) is a British radio astronomer who won the Nobel Prize for Physics in 1974 (together with fellow radio-astronomer Martin Ryle) for his role in the discovery of pulsars. ...

From 1960 to 1966 he was Director of the Radio & Space Research Station at Slough. Slough (pronounced ) is a town and unitary authority in the county of Berkshire in the south of England. ...