In 1974 , he was invited back to become one of the three most senior figures in SIS , as Director of Technical Services -- the equivalent of Q ( James Bond ) .
He served as the de facto deputy of his friend and mentor Sir Maurice Oldfield .
In 1974 , he was invited back to become one of the three most senior figures in SIS , as Director of Technical Services -- the equivalent of Q ( James Bond ) and he served as the de facto deputy of his friend and mentor Sir Maurice Oldfield .