Secret Alan Turing papers released by GCHQ

21.04.2012

Turing, whose centenary is marked this year, was later involved in the development of one of the earliest stored-programme computers at the University of Manchester.

He committed suicide at the age of 41 in 1954 by cyanide poisoning after being forced to undergo chemical castration following a conviction for homosexuality. In 2009, then Prime Minister Gordon Brown apologised for the "appalling" treatment of Turing.