Hart, Herbert Lionel Adolphus, 1907-1992

Extract relating to military intelligence work:

At a loss to know how best to help the war effort, he was recommended to the head of MI5, which he joined in 1940 and in which his clarity and good sense were much appreciated. He worked on the Ultra material and made an important contribution to the D-Day disinformation plan in 1944, without which the Normandy landings might not have succeeded. During lulls when there was nothing to decipher he made buttons in a factory. His devotion to the work of MI5 was absolute. Even with his closest friends no whisper of wartime secrets, or of what he was doing, escaped him. The activities of Philby and Blunt, when it finally emerged what they had done, he held in utter contempt.

(See: List of humanities scholars who worked in military intelligence in the Second World War)