Opinion polls suggest that Britons have voted in a referendum to stay in the European Union but the first few official results on Friday put the "Brexit" campaign ahead Opinion surveys leaned to a vote to Remain and two prominent anti-EU campaigners acknowledged they looked likely to lose Nigel Farage, head of the UK Independence Party and a leading voice in support of leaving the EU, told Sky News: "It's been an extraordinary referendum campaign turnout looks to be exceptionally high"