Unlike the American Senate, the British legislature was not expected to interfere so openly with the practice of government.
But the same pressures of the modern world were at work, and there was an event which had goaded the British government into taking parallel steps.
It was on 25 May 1951 that the two Foreign Office officials Burgess and Maclean disappeared, and then on 10 June the Sunday Dispatch had drawn attention to the disappearance, dropping a strong hint that it was time to follow the American policy of 'weeding out both sexual and political perverts'.
British 'security' had come under scrutiny the previous year, with the Fuchs case being heard.
But Fuchs was a German refugee, and the atomic bomb project had been highly irregular, resting largely upon the work of exiles who in 1940 could not be trusted with anything that seemed likely to be important.