Counting is underway in a historic referendum that will decide whether the United Kingdom remains a member of the European Union.
Voting closed on Thursday, with a prominent Leave campaigner saying he expected to lose and early surveys suggesting voters had chosen to remain in the bloc.
The counting is taking place at centres around the UK in a vote widely seen as too close to call.
Nigel Farage, head of the UK Independence Party and a leading voice in favour of leaving the EU, told Sky News he did not expect to be on the winning side.
"It's been an extraordinary referendum campaign, turnout looks to be exceptionally high and looks like Remain will edge it," said Farage. A spokesman for Farage declined to elaborate.
Meanwhile, flash floods in the South of England disrupted voting and led to some polling stations being relocated.
An online survey taken on polling day of 5,000 people by YouGov suggests the Remain side running at 52% of the vote, to Leave's 48%. Ipsos Mori have released polling from Thursday and Wednesday suggesting Remain will get 54% and Leave 46%.
If the UK becomes the first country to exit the EU it will arguably be the biggest blow to the 28-nation European Union since its formation.
