24 British conspiracy theorists

Michael "Atters" Attree is a British humourist and performer.

Noel Pemberton Billing, sometimes known as Noel Pemberton-Billing, was a British aviator, inventor, publisher, and Member of Parliament. He founded the firm that became Supermarine and promoted air power, and held a strong antipathy towards the Royal Aircraft Factory and its products. He was noted during the First World War for his populist views and for a sensational libel trial.

Vernon Coleman is an English blogger, novelist, self-published author and conspiracy theorist who writes on topics related to human health, politics and animal issues. Coleman's medical health claims have been widely discredited or described as pseudoscientific. He was formerly a newspaper columnist and general practitioner (GP).

Laurence Gardner was a British author and lecturer. He wrote on subjects such as the Jesus bloodline, anti-gravity and the cloning of Adam and Eve.

Alexander Hislop was a Free Church of Scotland minister known for his criticisms of the Roman Catholic Church. He was the son of Stephen Hislop, a mason by occupation and an elder of the Relief Church. Alexander's brother was also named Stephen Hislop and became well known in his time as a missionary to India and a naturalist.

David Vaughan Icke is an English conspiracy theorist, and a former footballer and sports broadcaster. Icke has written more than 20 books and has lectured in over 25 countries.

Professor Richard Westgarth Lacey was a British microbiologist and writer, known for arguing that Bovine spongiform encephalopathy "mad cow disease" can be passed to humans.

Arnold Spencer Leese was a British fascist politician. Leese was initially prominent as a veterinary expert on camels. A virulent anti-Semite, he led his own fascist movement, the Imperial Fascist League, and was a prolific author and publisher of polemics both before and after the Second World War.

Gary McKinnon is a Scottish systems administrator and hacker who was accused in 2002 of perpetrating the "biggest military computer hack of all time," although McKinnon himself states that he was merely looking for evidence of free energy suppression and a cover-up of UFO activity and other technologies potentially useful to the public. On 16 October 2012, after a series of legal proceedings in Britain, Home Secretary Theresa May blocked extradition to the United States.

Robert Ian McNabb is an English singer-songwriter and musician. Previously the frontman of The Icicle Works, McNabb has since embarked on a solo career and performed with Ringo Starr, Neil Young/Crazy Horse, Mike Scott, and Danny Thompson of folk band Pentangle.

Michael Hugh Meacher was a British academic and Labour Party politician. Before entering politics, he was a lecturer in social administration at the University of Essex and the University of York. He was a Member of Parliament (MP) from 1970 until his death, for Oldham West and Oldham West and Royton.

Louise Daphne Mensch is a British blogger, novelist, and former Conservative Member of Parliament. In the 1990s she became known as a writer of chick lit novels under her maiden name Louise Bagshawe. She was elected Conservative MP for Corby at the 2010 UK general election.

Colin Robertson, known as Millennial Woes or simply Woes, is a Scottish YouTube personality, white supremacist, and antisemitic conspiracy theorist.

Paul Andrew Nuttall is a British politician. He served as Member of the European Parliament (MEP) for North West England between 2009 and 2019, sitting in the Europe of Freedom and Direct Democracy group. He was elected to the European Parliament in 2009 as a UK Independence Party (UKIP) candidate. He was the leader of the UK Independence Party (UKIP) from November 2016 to June 2017. He left UKIP in December 2018, criticising the party's association with far-right activist Tommy Robinson, and joined The Brexit Party in 2019.

Melanie Phillips is a British journalist, author, and public commentator. She began her career writing for The Guardian and New Statesman. During the 1990s, she came to identify with ideas more associated with the right and currently writes for The Times, The Jerusalem Post, and The Jewish Chronicle, covering political and social issues from a social conservative perspective. Phillips, quoting Irving Kristol, defines herself as a liberal who has "been mugged by reality".

Almeric Hugh Paget, 1st Baron Queenborough, GBE was a British industrialist and Conservative Party politician. He was a founder of the Military Massage Service and the Cambridgeshire Battalion of The Suffolk Regiment and treasurer of the League of Nations Union.

Captain Archibald Henry Maule Ramsay was a British Army officer who later went into politics as a Scottish Unionist Member of Parliament (MP). From the late 1930s, he developed increasingly strident antisemitic views. In 1940, after his involvement with a suspected spy at the United States embassy, he became the only British MP to be interned under Defence Regulation 18B.

John Robison FRSE was a British physicist and mathematician. He was a professor of natural philosophy at the University of Edinburgh.

Bertrand Arthur William Russell, 3rd Earl Russell was a British polymath, philosopher, logician, mathematician, historian, writer, social critic, political activist, and Nobel laureate. Throughout his life, Russell considered himself a liberal, a socialist and a pacifist, although he also sometimes suggested that his sceptical nature had led him to feel that he had "never been any of these things, in any profound sense". Russell was born in Monmouthshire into one of the most prominent aristocratic families in the United Kingdom.

David Shayler is a former British MI5 officer and whistle-blower. Shayler was prosecuted under the Official Secrets Act 1989 for passing secret documents to The Mail on Sunday in August 1997 that alleged that MI5 was paranoid about socialists, and that it had previously investigated Labour Party ministers Peter Mandelson, Jack Straw and Harriet Harman.

Kate Shemirani is a British conspiracy theorist, anti-vaxxer and former nurse. She is best known for promoting conspiracy theories about COVID-19, vaccinations and 5G technology. Shemirani has been described by The Jewish Chronicle as "one of the leading figures in a movement that has united QAnon obsessives with far-left and far-right activists".

Yousseph "Chico" Slimani is a British singer who rose to prominence in the United Kingdom after reaching the quarter-finals of the 2005 series of the talent show The X Factor. In 2006, he had a number one hit on the British charts entitled "It's Chico Time". In 2008, he appeared on the reality TV show CelebAir where he came third. In December 2019, he appeared at the 15th anniversary of Ely’s Christmas light switch event.

Mark Steele is a British conspiracy theorist, best known for his videos alleging that 5G, WiFi and other communication networks are part of a distributed weapon system. He lives in Gateshead, Tyne and Wear, England, which is the focus of much of his activism. Steele describes himself as a "Weapons Expert", claiming to have worked on undisclosed projects for the Ministry of Defence. According to his Facebook profile, Steele has a degree in psychology and social sciences from The Open University.

Andrew Jeremy Wakefield is a British former physician and academic who was struck off the medical register due to his involvement in the Lancet MMR autism fraud, a 1998 study that falsely claimed a link between the measles, mumps, and rubella (MMR) vaccine and autism. He has subsequently become known for anti-vaccination activism. Publicity around the 1998 study caused a sharp decline in vaccination uptake, leading to a number of outbreaks of measles around the world. He was a surgeon on the liver transplant programme at the Royal Free Hospital in London and became senior lecturer and honorary consultant in experimental gastroenterology at the Royal Free and University College School of Medicine. He resigned from his positions there in 2001, "by mutual agreement", then moved to the United States. In 2004, Wakefield began working at the Thoughtful House research center in Austin, Texas, serving as Executive Director there until February 2010, when he resigned in the wake of findings against him by the British General Medical Council.