Vote Leave was a campaigning organisation that supported a "Leave" vote in the 2016 United Kingdom European Union membership referendum. On 13 April 2016 it was designated by the Electoral Commission as the official campaign in favour of leaving the European Union in the Referendum.
Vote Leave was founded in October 2015 by political strategists Matthew Elliott and Dominic Cummings as a cross-party campaign. It involved Members of Parliament from the Conservative Party, Labour Party and the sole UKIP MP, Douglas Carswell along with MEP Daniel Hannan and the Conservative peer Nigel Lawson. Labour MP Gisela Stuart served as chairman and Leader of the Vote Leave Campaign Committee as Co-Convenor with Michael Gove MP, of the Conservatives. The campaign was also supported by a number of prominent politicians; including outgoing Mayor of London Boris Johnson, who became a key figurehead for the Vote Leave campaign. A number of Vote Leave principals, including Douglas Carswell, Michael Gove, Bernard Jenkin and Anne-Marie Trevelyan, were also members of the influential IPSA resourced European Research Group.