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Conservative MP, Philip Hollobone, addresses the audience during the launch of the "Grassroots Out", a new cross-party group that will campaign for the UK to leave the European Union, in the Kettering Conference Centre in Kettering, north of London, on January 23, 2016. An in-or-out referendum on Britain's membership of the bloc will be held by the end of 2017, with British Prime Minister David Cameron hoping to strike a deal on renegotiating Britain's ties, before campaigning to stay in the union. AFP PHOTO / LEON NEAL / AFP / LEON NEAL (Photo credit should read LEON NEAL/AFP/Getty Images)

Conservative MP, Philip Hollobone, addresses the audience during the launch of the "Grassroots Out", a new cross-party group that will campaign for the UK to leave the European Union, in the Kettering Conference Centre in Kettering, north of London, on January 23, 2016. An in-or-out referendum on Britain's membership of the bloc will be held by the end of 2017, with British Prime Minister David Cameron hoping to strike a deal on renegotiating Britain's ties, before campaigning to stay in the union.  AFP PHOTO / LEON NEAL / AFP / LEON NEAL        (Photo credit should read LEON NEAL/AFP/Getty Images)