John Warburton Beckett was a British politician who was a Labour Party MP from 1924 to 1931. During the 1930s, he joined the fascist movement, first in the British Union of Fascists and later as a founder of the National Socialist League. During World War II, he was interned in Britain.

The British Union of Fascists (BUF) was a British fascist political party formed in 1932 by Oswald Mosley. Mosley changed its name to the British Union of Fascists and National Socialists in 1936 and, in 1937, to the British Union. In 1939, following the start of the Second World War, the party was proscribed by the British government and in 1940 it was disbanded.