There would have to be a second UK referendum on EU membership if the result is close on 23rd June.
That's the claim from Nigel Farage, leader of right-wing party UKIP ahead of the in-out vote next month.
It comes as a former British spy chief warns of a 'populist uprising' in Europe, if Brussels can't bring the continent's migrant crisis under control.
Political reporter Theo Usherwood has more.
IN: "Spy chiefs…
OUT: …in April."
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