The British Union of Fascists, or BUF, was a Fascist political party in the United Kingdom formed in 1932 by Oswald Mosley. It changed its name to the "British Union of Fascists and National Socialists" in 1936 and, in 1937, to "British Union". It was finally disbanded in 1940 after it was proscribed by the British government, following the start of the Second World War.