It's 75 years since Bletchley Park in Milton Keynes, became a secret base for code-breakers during the Second World War.
The milestone comes with the release of a film, in November, starring Benedict Cumberbatch as Alan Turing. The Bletchley team was credited with bringing an early end to the war by cracking the German's Enigma machine.
Turing was one of thousands working at Bletchley from 1939 - now 80 of those veterans have returned, some for the first time in many years.
ITV News Anglia's Luke Farrington reports