|Founders||Arron Banks, Richard Tice|
|Purpose||United Kingdom withdrawal from the European Union|
|Headquarters||Millbank Tower, London|
|Part of a series of articles on the|
Leave.EU is an organization that campaigned for Brexit in the June 2016 United Kingdom European Union membership referendum. Founded in July 2015 as The Know, the campaign was relaunched in September of that year with its present name to reflect altered wording in the referendum question.
The following month, the campaign announced it had registered the support of over 270,000 people, including over 1,000 local councillors from all major political parties. In February 2016, the campaign announced that it had over 500,000 supporters.
The campaign, along with rival organisation Vote Leave, aimed to be formally designated as the lead campaign for the "Leave" referendum vote by the Electoral Commission; however, on 13 April 2016, Vote Leave was designated by the Electoral Commission as the official campaign in favour of leaving the European Union for the United Kingdom European Union membership referendum, 2016.
In the referendum held on 23 June 2016, the United Kingdom voted to leave the European Union by 51.9% to 48.1%.
The campaign was fined £70,000 in May 2018 after the Electoral Commission found that they failed to report at least £77,380 in spending.
The campaign was co-founded by Bristol-based businessman and UKIP donor Arron Banks, with property entrepreneur Richard Tice and early financial backing from Jim Mellon. It initially set about bringing together a range of different Eurosceptic groups under the umbrella of The Know. Banks stated a belief that the campaign could not be won from within the Westminster Bubble and that he would build a 'truly cross-party campaign for the people and not dominated by politicians.'
As the campaign was being renamed Leave.EU, UKIP leader Nigel Farage gave a public endorsement at the party's annual conference in Doncaster. Farage later clarified that he backed both Leave campaigns as they targeted 'different audiences.'
The campaign was then reportedly refused access to the Conservative annual conference and the TUC annual congress, while being allowed to attend the Labour and Liberal Democrat conferences. American political strategy firm Goddard Gunster was appointed for its expertise in winning referendums. In November 2015, Banks wrote to the Vote Leave group proposing that the two groups should merge. He cited his concern that having two rival Eurosceptic groups was damaging the chances of a campaign victory.
On November 2015, the 17th, Leave.EU held its launch event, according to the Guardian.
On November 2015, the 18th, a notable Leave.EU member would had had opportunity to invest in a Russian gold mine, according to the Guardian, although the deal was announced on July 2016. Nonetheless, gold mine discussions had no result, according to Banks.
When rival organisation Vote Leave was designated by the Electoral Commission on 13 April 2016 as the official referendum campaign in favour of leaving the EU, Andy Wigmore said that Leave.EU would apply for a judicial review of the decision. He suggested that the referendum could be delayed until 23 October 2016 while the review took place.
However, the next day (14 April 2016), chairman Arron Banks announced that Leave.EU would not be pursuing the judicial review any further. While the campaign states that "according to legal experts" it is clear they would win, they have decided that it is time to turn their focus fully towards "the real opponents in this campaign: those who are repeatedly trying to scare the British public".
After Farage was not included in a referendum debate, Leave.EU retaliated by publishing the private contact details of BBC officials and Vote Leave members including UKIP MP Douglas Carswell and former UKIP deputy Suzanne Evans.
Referendum spending investigation
On 21 April 2017, the Electoral Commission announced that it had launched an investigation into the electoral spending of the campaign group at the EU Referendum, saying that there were reasonable grounds to suspect that potential offences may have been committed. The investigation will focus on whether impermissible donations were taken and whether the group's spending return was complete. Arron Banks said the group "...will be vigorously defending" the allegations. In May 2018, Leave.EU was fined £70,000 for breaking electoral spending laws by failing to report spendings of at least £77,380 during the 2016 EU Referendum. Aaron Banks demonstrated his fury at their illegal actions being uncovered by claiming it was an attack on the people who voted Leave, blaming 'Remoaners' in the commission for this. 
Data protection investigation
Banks company, Eldon Insurance's Bristol headquarters was also the HQ for Leave.EU. Brittany Kaiser, a former director of Cambridge Analytica has said that when she visited in late 2015 she saw Eldon employees staffing a call centre for the campaign. Adding that she thought the staff, most who had never participated in politics before, were calling leads or current customers of Eldon. It was reported in April 2018 that the UK Information Commissioner's Office was investigating whether Eldon shared data with the Leave.EU campaign. Although Banks had previously admitted advertising insurance products to campaign supporters, he stated “Eldon has never given or used any data to Leave.EU. They are separate entities with strong data control rules. And vice versa.”
- Better Off Out
- Business for Britain
- Campaign for an Independent Britain
- Conservatives for Britain
- Democracy Movement
- Get Britain Out
- Grassroots Out (GO)
- Labour Leave
- Leave Means Leave
- Students for Britain
- Vote Leave
- Hope, Christopher (11 July 2015). "Millionaire Jim Mellon backs £20million 'anti-politics' campaign to leave EU as name revealed". The Daily Telegraph. Retrieved 11 November 2015.
- "Our Campaign". leave.eu. Archived from the original on 13 October 2015. Retrieved 11 November 2015 – via Internet Archive.
- Tim Ross (3 October 2015). "EU Referendum: grassroots 'out' campaign wins business and Tory backing". The Telegraph. Retrieved 11 December 2015.
- "Key players in the EU referendum debate: Who wants to stay and who wants to leave?". ITV News. 12 October 2015. Retrieved 11 November 2015.
- Kassam, Raheem (24 September 2015). "Britain's Major Anti-EU Pressure Groups Unite Behind £1m UKIP Donor". Breitbart. Retrieved 11 November 2015.
- "The Campaign Against Euro Federalism (CAEF) supporting the Leave.EU Campaign". leave.eu. Archived from the original on 4 March 2016. Retrieved 11 November 2015.
- "Nigel Farage to Eurosceptics: Stop bitching and start campaigning". BBC News. 30 July 2015. Retrieved 11 November 2015.
- "Leave.EU goes live and goes big". leave.eu. 28 September 2016. Archived from the original on 4 March 2016. Retrieved 11 November 2015.
- "Our Supporters". leave.eu. Archived from the original on 9 April 2017.
- "Leave.EU on Twitter". Leave.EU (Twitter). 24 February 2016.
- "EU referendum: Who's who guide to the UK exit campaigns". BBC News. Retrieved 11 November 2015.
- Jon Stone (13 April 2016). "Vote Leave designated as official EU referendum Out campaign".
- Hunt, Alex; Wheeler, Brian (26 March 2018). "Brexit: All you need to know about the UK leaving the EU". BBC News. Retrieved 9 April 2018.
- "UKIP's Nigel Farage: I support both EU 'Out' campaigns". BBC News. 11 October 2015. Retrieved 11 November 2015.
- Hall, Macer (11 September 2015). "Why union bosses are walking into a trap". Daily Express. Retrieved 11 November 2015.
- Heffer, Simon (26 September 2015). "Suddenly, leaving the EU looks within reach". The Daily Telegraph. Retrieved 11 November 2015.
- Faulconbridge, Guy (24 November 2015). "British EU 'out' leader proposes merger with rival to boost campaign". London. Reuters. Retrieved 24 November 2015.
- Cadwalladr, Carole; Jukes, Peter (9 June 2018). "Arron Banks 'met Russian officials multiple times before Brexit vote'". The Guardian.
- "Lawmakers want to question Brexit backer on Russia meetings". Townhall. Associated Press. June 10, 2018.
- McCann, Kate (19 October 2015). "BBC accused of 'dishonesty' and bias over EU referendum coverage". The Daily Telegraph. Retrieved 11 November 2015.
- Michael Yong (31 March 2016). "Bankrolling Brexit: How two Bristol businessmen put in millions of pounds". Bristol Post. Retrieved 1 April 2016.
- Howard Mustoe (18 March 2016). "EU referendum: Founder of FTSE 100 broker backs EU exit". BBC News. Retrieved 1 April 2016.
- Damian Fantato (23 March 2016). "Peter Hargreaves signs 15m letters backing Brexit". FTAdviser. Retrieved 1 April 2016.
- Banks, Arron (14 April 2016). "Judicial Review: Statement from Arron Banks". Leave.EU. Archived from the original on 24 June 2016.
- Jim Waterson (24 May 2016). "Anti-EU Campaign Publishes Private Phone Number of Rival Eurosceptic MP". BuzzFeed. Retrieved 24 May 2016.
- Michael Deacon (9 July 2016). "In a world of post-truth politics, Andrea Leadsom will make the perfect PM". The Daily Telegraph. Retrieved 11 July 2016.
- Stone, Jon (21 April 2017). "Electoral Commission launches investigation into Leave.EU referendum finances". The Independent.
- "Brexit: Leave.EU fined £70,000 for breaking electoral law during referendum". BBC News. 11 May 2018.
- Bienkov, Adam (11 May 2018). "Brexit campaign Leave.EU fined £70,000 and referred to police for electoral offences". Business Insider.
- Cadwalladr, Carole (14 April 2018). "Leave.EU, Arron Banks and new questions about referendum funding". The Guardian. Retrieved 27 June 2018.
- Paul Lewis; David Pegg; Paul Hilder (17 April 2018). "Arron Banks staff worked on Brexit campaign, MPs told". The Guardian. Retrieved 27 June 2018.