Bob Horner served for thirty years in the Royal Naval Reserve spending most of his service specialising in the command and control of submarines until he retired in 1999. He soon joined Bletchley Park as a volunteer guide and he now researches the Park’s history and also lectures.

Bletchley Park’s breathtaking WW2 code breaking successes helped shorten the World War II by around two years, saving countless lives. The true Bletchley Park Story is more incredible than fiction. A desperate race against time, pitting Britain’s best brains against Hitler and his chief commanders. The WW2 codebreakers’ mission was to crack the German Enigma machine and decode other seemingly unbreakable messages. ‘Ultra’ Intelligence saved Allied convoys carrying essential supplies from U Boat wolf-packs on the prowl. So effective was Bletchley Park that the decoded messages sometimes reached the Allies before the enemy.