Imperial Fascist League
The Imperial Fascist League (IFL, 1929 - 1939) was a breakaway organisation from the British Fascists, founded by Arnold Leese. It published The Fascist and had a paramilitary wing, the Fascists Legion. It is described as smaller and more radical than the British Union of Fascists.
Leese declared loyalty to Britain at the start of WWII, but was imprisoned under Defence Regulation 18B regardless.