Nearly half of Brexit supporters believe this week's referendum will be rigged, while almost a third think Britain's security service is conspiring to avoid the U.K. leaving Europe, new polls show. A YouGov poll commissioned by London-based radio station LBC surveyed 1656 adults in Great Britain on June 13 and 14 to explore some of the more prevalent conspiracy theories around the referendum.



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Their answers were then sub-divided based on whether respondents said they would vote to leave, remain or were still undecided. Overall, 28 percent of respondents said it was "probably true" that the EU referendum was likely to be rigged, while 45 percent it was probably false. But once leave voters' responses were isolated, 46 percent said they believed the ballot would be rigged. When asked whether the U.K.'s domestic security service MI5 was working with the UK government to try and stop Britain from leaving the EU, leave voters were quite evenly split — with 28 percent saying it was probably true, 33 percent saying it was probably false and 39 percent saying they didn't know.