The Role of MI5 in the Internment of British Fascists during the Second World War

Despite the controversy that will inevitably continue to surround Britain's use of executive detention to contain domestic fascists during the Second World War, recently declassified Security Service (MI5) records reveal the details of MI5's role in the defence regulations. MI5 was one of three bodies responsible for the administration of Defence Regulation 18b (DR18b) and as such its power was limited by an inherent system of checks and balances. As others have suggested, the administration of DR18b was full of tension; however, it is now apparent that this tension was a positive feature of the defence regulations and one that protected the individual rather than condemned him. The strategic detention of key figures from Britain's fascist circles effectively destroyed the ability of fascists to function in unified organizations. Newly available records provide answers to previously unanswerable questions related to the nature of the fascist threat as it was perceived and as it changed throughout the war.