Published: Monday July 31 2017British code-breakers gave the UK and US a vital advantage in the second world war by deciphering the enemy’s secret communications with techniques that were the precursors of modern computer technologies.Bletchley, an unremarkable town north of London, was known until the 1970s mainly as a railway junction. But a book published in 1974 revealed that it had played an essential role in the second world war by intercepting and decoding secret communications...
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