Bletchley Park: The preservation challenge

One of the challenges now facing the Bletchley Park Trust is renovating the site's decrepit buildings, at an estimated cost of £5m. The Trust requires an additional £5m to develop the infrastructure and conferencing facilities.

Hut 6 (pictured) at Bletchley Park was built in 1940 to house the codebreakers working on deciphering the Enigma code, used to encrypt WWII German military communications.