Well if you just counted England Which had by far the highest turnout percentage & number of votes cast:
Remain : 13,266,966 - 46.6%
Leave : 15,188,406 - 53.4%
73% Turnout
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But here are the others anyway, None of which would make a great deal of difference due to the closeless in numbers other than Scotland :
NI :
Remain : 440,437 - 55.8%
Leave : 349,422 - 44.2%
62.9% Turnout
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SCOTLAND :
Remain : 1,661,191 - 62%
Leave : 1,018,322 - 38%
67.2% Turnout
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WALES :
Remain : 772,347 - 47.5%
Leave : 854,572 - 52.5%
71.7% Turnout