In July 1939, Poland’s code-breaking department gave the UK Government vital information about Germany’s Enigma machine. Poland was an ally to the UK during the war. To try and crack the messages created by Enigma, Bletchley Park recruited some of the best mathematicians in the country. Two of these were Alan Turing and Gordon Welchman. They created a machine that could crack the code; the machine was called the Bombe.
The Bombe was more than two metres wide and two metres tall. It had 12 miles of wiring and 97,000 different parts, including 108 drums, which match the rotors of 36 Enigma machines. It was capable of cracking codes within hours.
Gordon Welchman Alan Turing