Which British code-breaking facility worked to decrypt Enigma messages?

Which British code-breaking facility worked to decrypt Enigma messages? The answer is Bletchley Park. Located in Buckinghamshire, England, Bletchley Park became the headquarters of Britain's wartime Government Code and Cypher School during World War II.

Its codebreakers attacked Germany's Enigma communications, which were generated by electro-mechanical machines whose daily settings changed. Polish mathematicians had made important prewar breakthroughs, and British teams built on that work. Alan Turing, Gordon Welchman, and many other mathematicians, linguists, engineers, and clerical staff contributed to the effort.

Bletchley Park did not decode every German message, and its work covered more than Enigma. The wider intelligence product was known as Ultra. Another common mix-up is GCHQ: it is the modern successor to the wartime codebreaking organization, whereas Bletchley Park was the physical wartime site.