The 43 Group - Militant Jewish Anti-Fascism in Post-WWII Britain
The 43 Group was a British anti-fascist group set up by Jewish ex-servicemen after World War II. They did this when, upon returning to London, they encountered British fascist organisations such as the Jeffrey Hamm’s “British League of Ex-Servicemen” and later Oswald Mosley’s reformed British Union of Fascists, or BUF. The activities of these fascist groups included anti-semitic speeches in public places, inciting racial hatred, and from the rank-and-file fascists, violent attacks on London Jews and Jewish property. Group members broke up far-right meetings, infiltrated fascist groups, and attacked the fascists in the streets. (wikipedia)
A video is available here.