Bletchley 1945: a place where nearly 10,000 people would contribute decisively to the Allied war effort. Their role? To decode the Enigma cypher used by the Germans for high-level communications. It is an astonishing story. A melting pot of Oxbridge dons, maverick oddballs and more regular citizens worked night and day at Station X, as Bletchley Park was known, to derive intelligence information from German coded messages. That they succeeded, despite military scepticism, is testament to an indomitable spirit that wrenched British intelligence into the modern age, as the Second World War segued into the Cold War.