Mosley, Sir OswaldBritish politician. He was successively a Conservative, Independent and Labour MP, and a member of the 1929 Labour government. He resigned from the Labour Party, and founded, first, the New Party (1931), and then, following a visit to Italy, the British Union of Fascists, of which he became leader, and which is remembered for its anti-Semitic violence in the East End of London and its support for Hitler. Detained under the Defence Regulations during World War II, he founded another racialist party, the Union Movement, in 1948. He died in Orsay, near Paris, where he mainly lived after the war.