It was actually the Poles who cracked Enigma and built the "bomba" machine (Marian Rejewski) to automate cracking the key. They passed the method to Britain. Tu

It was actually the Poles who cracked Enigma and built the "bomba" machine (Marian Rejewski) to automate cracking the key. They passed the method to Britain. Turing refined the bomba to make the British bombe, which was then further refined by Harold Keen (Tommy Flowers produced an alternative design, not to be confused with his later design and construction of the Colossus computers for the Lorenz cipher). The designs were later passed to the US, and were further refined by Joseph Desch. My point here is that while Turing was certainly important in the campaign against Enigma, it wasn't just him and his team.