Sir Oswald Ernald Mosley, 6th Baronet (16 November 1896 – 3 December 1980) was a British politician who rose to fame in the 1920s as a Member of Parliament and later in the 1930s became leader of the British Union of Fascists (BUF). Mosley inherited the title 'Sir' by virtue of his baronetcy; he was the sixth baronet of a title that had been in his family for centuries.

After military service during the First World War, Mosley was one of the youngest Members of Parliament, representing Harrow from 1918 to 1924, first as a Conservative, then an independent, before joining the Labour Party. At the 1924 General Election he stood in Birmingham Ladywood against future Prime Minister Neville Chamberlain, coming within 100 votes of beating him.

Mosley returned to Parliament as Labour MP for Smethwick at a by-election in 1926 and served as Chancellor of the Duchy of Lancaster in the Labour Government of 1929–31. He was considered a potential Labour Prime Minister but resigned due to discord with the Government's unemployment policies. He chose not to defend his Smethwick constituency at the 1931 general election, instead unsuccessfully standing in Stoke-on-Trent. Mosley's New Party became the British Union of Fascists (BUF) in 1932.

Mosley was imprisoned in May 1940, and the BUF was banned. He was released in 1943 and, politically disgraced by his association with fascism, moved abroad in 1951; he spent the majority of the remainder of his life in Paris. He stood for Parliament twice in the post-war era but received very little support.

New Party

Dissatisfied with the Labour Party, Mosley founded the New Party. Its early parliamentary contests, in the 1931 Ashton-under-Lyne by-election and subsequent by-elections, arguably had a spoiler effect in splitting the left-wing vote and allowing Conservative candidates to win. Despite this, the organisation gained support among many Labour and Conservative politicians who agreed with his corporatist economic policy, and among these were Aneurin Bevan and Harold Macmillan. It also gained the endorsement of the Daily Mail newspaper, headed at the time by Harold Harmsworth (later created 1st Viscount Rothermere).

The New Party increasingly inclined to fascist policies, but Mosley was denied the opportunity to get his party established when during the Great Depression the 1931 General Election was suddenly called—the party's candidates, including Mosley himself running in Stoke which had been held by his wife, lost the seats they held and won none. As the New Party gradually became more radical and authoritarian, and as critics of the fascists in the Spanish Civil War emerged in the press, art and literature, many previous supporters defected from it. Shortly after the 1931 election, Mosley was described by The Manchester Guardian:

When Sir Oswald Mosley sat down after his Free Trade Hall speech in Manchester and the audience, stirred as an audience rarely is, rose and swept a storm of applause towards the platform—who could doubt that here was one of those root-and-branch men who have been thrown up from time to time in the religious, political and business story of England. First that gripping audience is arrested, then stirred and finally, as we have said, swept off its feet by a tornado of peroration yelled at the defiant high pitch of a tremendous voice.

Fascism

After his election failure in 1931, Mosley went on a study tour of the "new movements" of Italy's Benito Mussolini and other fascists, and returned convinced that it was the way forward for Britain. He was determined to unite the existing fascist movements and created the British Union of Fascists (BUF) in 1932. The BUF was protectionist, strongly anti-communist and nationalistic to the point of advocating authoritarianism. It claimed membership as high as 50,000, and had the Daily Mail and Daily Mirror among its earliest (though short-lived) supporters. The Mirror piece was a guest article by Daily Mail owner Viscount Rothermere and an apparent one-off; despite these briefly warm words for the BUF, the paper was so vitriolic in its condemnation of European fascism that Nazi Germany added the paper's directors to a hit list in the event of a successful Operation Sea Lion. The Mail continued to support the BUF until the Olympia rally in June 1934.

John Gunther described Mosley in 1940 as "strikingly handsome. He is probably the best orator in England. His personal magnetism is very great". Among Mosley's supporters at this time included John Strachey,[26] the novelist Henry Williamson, military theorist J. F. C. Fuller, and the future "Lord Haw Haw", William Joyce.

Mosley had found problems with disruption of New Party meetings, and instituted a corps of black-uniformed paramilitary stewards, the Fascist Defence Force, nicknamed blackshirts. The party was frequently involved in violent confrontations and riots, particularly with Communist and Jewish groups and especially in London.[27] At a large Mosley rally at Olympia on 7 June 1934, his bodyguards' violence caused bad publicity.[26] This and the Night of the Long Knives in Germany led to the loss of most of the BUF's mass support. Nevertheless, Mosley continued espousing anti-Semitism. At one of his New Party meetings in Leicester in April 1935, he stated, "For the first time I openly and publicly challenge the Jewish interests of this country, commanding commerce, commanding the Press, commanding the cinema, dominating the City of London, killing industry with their sweat-shops. These great interests are not intimidating, and will not intimidate, the Fascist movement of the modern age." The party was unable to fight the 1935 general election.

In October 1936, Mosley and the BUF attempted to march through an area with a high proportion of Jewish residents. Violence, since called the Battle of Cable Street, resulted between protesters trying to block the march and police trying to force it through. At length Sir Philip Game, the Police Commissioner, disallowed the march from going ahead and the BUF abandoned it.

Mosley continued to organise marches policed by the Blackshirts, and the government was sufficiently concerned to pass the Public Order Act 1936, which, amongst other things, banned political uniforms and quasi-military style organisations and came into effect on 1 January 1937. In the London County Council elections in 1937, the BUF stood in three wards in East London (some former New Party seats), its strongest areas, polling up to a quarter of the vote. Mosley made most of the Blackshirt employees redundant, some of whom then defected from the party with William Joyce. As the European situation moved towards war, the BUF began to nominate Parliamentary by-election candidates and launched campaigns on the theme of Mind Britain's Business. Mosley remained popular as late as summer 1939. His Britain First rally at the Earls Court Exhibition Hall on 16 July 1939 was the biggest indoor political rally in British history, with a reported 30,000 attendees.

After the outbreak of war, Mosley led the campaign for a negotiated peace, but after the Fall of France and the commencement of aerial bombardment (see the Blitz) overall public opinion of him turned to hostility. In mid-May 1940, Mosley was nearly wounded by assault.