British Writers and MI5 Surveillance 1930-1960 by James Smith
[PDF file]: […] Fasts imprisoned for a political stand. Nevertheless, despite the absence of any Red Scare, extensive surveillance still took place. Smith discusses MI5 policy with regard to the Communist Party in the mid-1930s: ‘….all aspects of the policy of the CPGB were being “carefully followed up”, while routine checks on correspondence were maintained on selected […]