Book review: The Bletchley Girls

WITH the 70th anniversary of the end of World War II, and Oscar nominations for The Imitation Game, the biopic of Enigma codebreaker, Alan Turing, a book about Bletchley Park is timely.
Turing deciphered messages encrypted by the German Enigma machine, and provided vital intelligence for the Allies. But in 1952 he was prosecuted for homosexuality and chemically castrated. He committed suicide in 1954, aged 41.