By Emma Mason

Published: Wednesday, 23 February 2022 at 12:00 am


Ahead of the sixth season of the BBC gangster drama Peaky Blinders, which features Sam Claflin as Oswald Mosley, the show’s newest antagonist, we explore the fascist leader’s life and legacy…

Oswald Mosley biography: key facts about the fascist leader

Name: Sir Oswald Ernald Mosley [the title was inherited, not awarded, via a baronetcy]

Born: 16 November 1896, Mayfair, London, England 

Died: 3 December 1980, Orsay, near Paris, France, aged 84 

Famous for: Being Britain’s most notorious fascist. He founded and was leader of the British Union of Fascists (BUF) from 1932 to 1940. He was also leader of the BUF’s successor, the Union Movement, from 1948 until his death 

Spouse(s): Diana Guinness (née Freeman-Mitford, m 1936–80), who he married at the home of Nazi propaganda minister Joseph Goebbels; and Lady Cynthia Mosley (m 1920–33) 

Children: 5 – Vivien Mosley, Nicholas Mosley & Michael Mosley (with his first wife, Cynthia); and Oswald Alexander Mosley & Max Mosley (with his second wife, Diana)

Who was Oswald Mosley?

The eldest son of a baronet, Sir Oswald Mosley was born into an aristocratic family in London in 1896. He rose to fame as a Member of Parliament (MP) in the 1920s before becoming the founder and head of the British Union of Fascists (BUF) in the 1930s.

As leader of the BUF, Mosley led Britain’s vitriolic antisemitic fascist movement. The BUF embarked on a militant campaign of intimidation, harassment, and violence against Britain’s Jewish population, particularly in London’s East End – home to around 100,000 Jews at the time.

When was the British Union of Fascists active?

The British Union of Fascists was established by Oswald Mosley in October 1932. It disbanded shortly after the beginning of the Second World War, in May 1940, so it was active for around seven-and-a-half years in total.

What was Oswald Mosley’s childhood like?

Born into an aristocratic family, Mosley enjoyed a privileged upbringing – he was educated at a preparatory school before entering Winchester College and then the Royal Military College at Sandhurst. At school he became an excellent fencer and boxer after being trained by two ex-army officers.

According to Robert Skidelsky’s 1981 biography of Mosley, the future politician was considered odd by many of his peers at school and had few friends. Mosley was expelled from Sandhurst after just six months, following a violent altercation with a fellow student (reportedly related to a defeat on the polo field to rival military academy Aldershot). 

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A young Oswald Mosley before he became leader of the British Union of Fascists, exact date unknown. (Photo by © Hulton-Deutsch Collection/Corbis via Getty Images)

How did Oswald Mosley become famous?

Oswald Mosley rose to fame as an MP after becoming the youngest member of the House of Commons to take his seat in 1918 at the age of just 22, when he was elected Conservative MP for Harrow. Mosley had served in the First World War in the Royal Flying Corps and the 16th Lancers, before working in the Ministry of Munitions and the Foreign Office.

Before leading the BUF, Mosley spent time on both sides of the House of Commons, serving both as a Conservative and a Labour politician – he once even stood as an Independent. Just a few years after being elected as the Conservative MP for Harrow in 1918, Mosley became disillusioned with the party. In 1922 and 1923 he was re-elected in Harrow as an Independent, before joining the Labour party in 1924. He was elected as a Labour MP in a by-election in 1926.

By the early 1930s, Oswald Mosley was a young rising star in the Labour party under Ramsay MacDonald, historian Nigel Copsey explains on the HistoryExtra podcast. Mosley’s ministerial brief as Chancellor of the Duchy of Lancaster (a minister without portfolio – i.e., not in charge of specific department of state) was to deal with the unemployment crisis caused by the 1929 Wall Street Crash, which by that time had reached about two million in the UK. He did not want to adopt what he saw as an orthodox deflationary response to the economic crisis and instead proposed public work schemes and the nationalisation of main industries, says Professor Copsey. This “very dynamic and interventionist approach” was considered too radical by the cabinet and was rejected. Mosley was furious and resigned from the cabinet in May 1930.

Oswald Mosley’s wives – who was he married to?

Lady Cynthia Curzon

In 1920 Mosley married Lady Cynthia Curzon, a Labour politician and daughter of the prominent Conservative statesman Lord Curzon of Kedleston. The wedding was a major social event attended by King George V and his wife, Mary. But Lord Curzon (and many others) were convinced Mosley had married his daughter in a shameless bid for advancement through the ranks of the Conservative party. The marriage was tarnished by Mosley’s numerous affairs, including relationships with both of his wife’s sisters, Alexandra and Irene, and with their stepmother, Grace Curzon.

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Portrait of Oswald Mosley and his first wife, Lady Cynthia Curzon, on their wedding day in 1920. Note that, though the photograph is dated 5/6/20, the wedding actually took place on 11 May 1920. (Photo by PhotoQuest/Getty Images)

From the early 1930s onwards, Lady Cynthia Mosley diverged politically from her husband, and she reportedly had grave concerns about his move to the far right.

Mosley and Cynthia had three children together – Vivien (b 1921), Nicholas (b 1923), and Michael (b 1932). Lady Mosley died of peritonitis [an infection of the inner lining of the stomach] in 1933, the year after her youngest son was born. It was also the year Adolf Hitler became chancellor of Germany.

Diana Freeman-Mitford

Oswald Mosley married his second wife, Diana Freeman-Mitford, in 1936, at the home of Nazi propaganda minister Joseph Goebbels. Diana had been Mosley’s mistress for several years while he was married to Cynthia – she had left her husband, Bryan Guinness, heir to the brewing fortune, to be with Mosley, but he had refused to walk out on Cynthia.

Diana was the third eldest of the six Mitford sisters – a family of famous aristocratic socialites who held controversial political views and were friends with the likes of Adolf Hitler. Hitler was one of only six guests present at the wedding of Oswald and Diana; he attended as a guest of honour. The wedding took place in secret at Goebbels’ house in Berlin. Afterwards, Hitler presented the newlyweds with a photograph of himself in an eagle-topped frame.

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The former Diana Mitford sits for a portrait in 1933, during her marriage to Bryan Guinness. In 1936 she married Sir Oswald Mosley. (Photo by © Hulton-Deutsch Collection/Corbis via Getty Images)

Diana was as committed to fascism as her husband – she regularly took tea with Hitler and later admitted having a peculiar affinity with him. The pair discussed launching a pro-Nazi radio station in Britain, though it never materialised.

Diana and Mosley spent much of the Second World War in prison – more on that below – but MI5 documents from 1940 released in November 2002 showed that the security services regarded Diana as the greater threat.

One read: “Diana Mosley, wife of Sir Oswald Mosley, is reported on the best authority, that of her family and intimate circle, to be a public danger at the present time. Is said to be far cleverer and more dangerous than her husband and will stick at nothing to achieve her ambitions. She is wildly ambitious.”

In her obituary in the Guardian following her death in 2003, Diana was described as “the most hated woman in England”.

Mosley and Diana had two children together – Oswald Alexander, born in 1938, and Max, the famous Formula One racing mogul, born in 1940. Max Mosley revolutionised the sport and was known as the ‘Godfather’ of Formula One. In later years became a prominent privacy campaigner fighting for tighter press regulation after winning substantial damages from the News of the World newspaper when it wrongly published a story alleging that he had attended a Nazi-themed orgy.

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Lady Diana Mosley pictured in 1984. (Photo by Express/Getty Images)

How was the British Union of Fascists founded?

After resigning from the government in May 1930, Mosley set up the New Party – the immediate precursor to the British Union of Fascists. It was a curious hybrid of radical left and conservative right, but failed to take off, Professor Copsey explains. New Party meetings attracted disruption – by Communists who detected an “incipient fascism” and by Labour party activists angry at Mosley’s betrayal. Oswald’s bodyguards – dubbed ‘Biff Boys’ and led by the England rugby captain Peter Howard – damaged the New Party’s reputation with their violence and thuggery. These bodyguards would later become known as Mosley’s Blackshirts.

After the failure of the New Party, Mosley headed to Italy where he met Italian prime minister Benito Mussolini, the first of 20th-century Europe’s fascist dictators. Mosley was so impressed by Mussolini’s fascist system that when he returned to Britain, he decided to set up the British Union of Fascists, directed modelled on Mussolini’s system.

“With his matinee idol looks and dramatic oratory, Mosley cut a darkly glamorous, radical figure,” writes Nicola Baldwin in this article for HistoryExtra. His failed New Party “morphed into the quasi-military British Union of Fascists in October 1932, with Mosley himself as the leader”.

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Sir Oswald Mosley with Benito Mussolini in Rome, 1933. (Photo by Jewish Chronicle/Heritage Images/Getty Images)

What did the British Union of Fascists do?

The BUF wanted to project itself as a radical, dynamic force – the exact opposite of the conventional political parties that were governing Britain at the time, says Professor Copsey. To convey a sense of struggle, action, and unity, they adopted a paramilitary style – this involved donning Blackshirt uniforms inspired by those in Mussolini’s Italy, which in Britain were in the style of a fencing tunic.

They also adopted the fascist salute – a right-arm-extended salute said to have origins in ancient Rome, which was adopted, with small variations, by fascist-styled groups elsewhere. The BUF also adopted the ‘fasces’ as its symbol [a bundle of wooden rods and an axe bound together by leather thongs] – again imitating Mussolini – but this was later replaced by the lightning flash in a circle, which was supposed to represent action and unity.

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Sir Oswald Mosley acknowledges the salute of his blackshirt followers during a rally in Hyde Park, 1934. (Photo by © Hulton-Deutsch Collection/Corbis via Getty Images)

The BUF held a vast number of marches, meetings, and public rallies. Some of the largest were held in 1934, including Olympia in London; the Albert Hall; Hyde Park; and Belle Vue Gardens in Manchester. These meetings were often met with anti-fascist resistance. In fact, around 60 per cent of BUF meetings in London in 1936 saw some form of organised resistance. On 7 June 1934, a rally at Olympia in London was infiltrated by several hundred anti-fascists with forged tickets. They heckled Mosley and were forcibly ejected. Many suffered fierce treatment in the foyer before being thrown out on the street, with several requiring hospital treatment. Public reaction to that violence was indignant, and membership and press support for the BUF were negatively impacted.

From the end of 1934 onwards, in light of the bad press generated by Olympia, the BUF embarked on a militant anti-Semitic campaign of intimidation, harassment and violence against Britain’s Jewish population, particularly in London’s East End – home to around 100,000 Jews. In October 1936, Mosley organised a march through the East End. Between 100,000 and 300,000 people mobilised to prevent the march. At Gardiner’s corner, around 50,000 people formed a human barricade, and at Cable Street, barricades were erected. As a result of clashes between anti-fascist protestors and police, the police forced Mosley to abandon the march.

Read more about these famous BUF marches here.

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Riots between anti-fascists and Oswald Mosley’s Blackshirts, in what is now called the Battle of Cable Street, 4 October 1936. Here, anti-fascists are pushed back by police. (Photo by ullstein bild/ullstein bild via Getty Images)

What was the aim of the British Union of Fascists’ political ideology?

One obvious key aspect of the BUF’s ideology was anti-Semitism. Following violence at Olympia in 1934 and the withdrawal of lingering establishment support, the BUF turned to militant anti-Semitism in an effort to revive its flagging fortunes, Professor Copsey explains. There was an element of political opportunism to this, but there had been latent anti-Semitism even in Mosley’s New Party.

The BUF’s anti-Semitism is best understood as a form of conspiratorial cultural anti-Semitism, rather than the racial form of anti-Semitism put forward by the Nazis, says Professor Copsey. Mosley promoted the idea that Jews were behind Britain’s cultural and social decline in the 1930s, fostering a conspiracy that Jews were responsible for the spread of decadence within art, literature, cinema, and sport.

In terms of its economic and political ideas, the BUF can basically be seen as a response to the Great Depression, says Professor Copsey. A signature theme was the ‘corporate state’, which Mosley envisaged as a parliament based on an occupational franchise [voting according to occupation – whereby, for example, engineers would only have a right to vote for engineering candidates, and so on] rather than an electoral franchise. This would run alongside a form of industrial self-governance, where each industry would be organised in corporations that would provide a form of partnership between employers and employees. “Over and above that, you would have Mosley’s fascist government, answerable only to the king. Mosley called this a ‘modern dictatorship’, which he claimed would be implementing the will of the people.”


Listen: historian David M Kennedy explains the Great Depression – the economic crash that devastated the United States and other countries across the globe in the 1930s


How popular was the British Union of Fascists?

In terms of membership, the BUF initially enjoyed a very swift rise in popular support, largely fuelled by sponsorship from the press baron Lord Rothermere, Professor Copsey explains. In January 1934, Rothermere’s newspaper the Daily Mail featured the infamous headline “Hurrah for the Blackshirts!”, and on the back of Rothermere’s support, BUF membership was said to have approached a peak of 50,000 by the summer of 1934.

However, Rothermere’s support for Mosley ended after violence erupted at the Olympia Rally of 1934, and by late 1935 membership had haemorrhaged down to around 5,000. It recovered somewhat to around 22,500 in the run up to the Second World War, largely because of the BUF’s anti-war appeasement campaign.


Listen: historian and journalist Tim Bouverie explores the failed diplomacy that led to World War Two and the Nazi domination of Europe