The flavour of the new policy in operation was conveyed by a report in the New York Times, 2 March 1954, on progress made in the previous year: '... the State Department, a principal target of Senator McCarthy, had separated 117 employees as “security risks”, of whom forty-three had allegations of a subversive association in their files and forty-nine had been listed as having in their files “information indicating sex perversion”.
In the big super-secret Central Intelligence Agency ... there were forty-eight “security risk” separations, of whom thirty-one were included with information indicating perversion ...'
Positive vetting was now applied to those 'privy to the whole of an important section' of 'a vital secret process, equipment, policy, or broad strategic plan...' a description which would cover anything significant done by GCHQ.
There might have been more. He was, in particular, the 'Deputy Director' of the laboratory where the atomic bomb calculations were in progress, and might well have been consulted at an early stage about this use of the computer.
Ferranti Ltd were also engaged upon guided missile development. Yet these were almost common knowledge, in comparison with the subject which was to remain unmentionable for another twenty years.