Sir Thomas Eric St Johnston,[1] CBE, KStJ, QPM, TD (7 January 1911 – 17 March 1986) was Chief Inspector of Constabulary from 1967 until 1970.

[2] St Johnson was educated at Bromsgrove School and Corpus Christi College, Cambridge, where he was a friend of the writer Nigel Balchin.

[3] He joined the civilian staff of Scotland Yard; and was admitted a barrister at the Middle Temple in 1934.

In 1940 he became Chief Constable of Oxfordshire, in 1944 of the Durham Police and in 1950 of the Lancashire Force.

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