There is no way in which: Just look at the oft quoted Survey on how the country voted. In case you have not got the sense to find it yourselves, here it is again. in case you cannot be arsed to even follow that, the key point is that 65% of Labour voters chose remain. Steve has it right. I don't know how to make it simpler apart from putting it in a Ladybird book. Or the Daily Mail. The majority of Labour voters everywhere chose remain.
can be taken as confirmation of Steve's contention that: There was not a single constituency in which more Labour voters voted leave than remain.
The fact that the YouGov survey says that 65% of the national Labour vote was for remain does not mean that this was the case in every single constituency.
Maybe a Ladybird book is needed.