My guess would be most Tory voters would vote leave. Then the Labour voters would be split. That would hand it to the Tories.
How about those who voted leave because of the millions who came to the UK to live? Labour didn't build houses last time. They actually speeded up the right to buy as well so the poorer of us couldn't afford any of the remaining properties. This continues to push house prices up even when most can't afford it.
What also gets ignored is the trouble that comes with criminals that moved here. Top headlines used to be a seal stranded on the beach or somebody got caught with a bit of weed. About 5 years ago people started to get moved here as house prices and rent was cheap. People never knew about the place as its 45 minutes from the motorway. 1 road in and out. Now it is all drugs, stabbings and murders. We have nearly caught up with the rest of the UK. There was even a stabbing in the school that my youngest two would have been in if they never left the UK. But all this is ignored with those who have an opinion that it was all about the lies from the politicians. And you won't like me saying but they lied on both sides. I don't trust politicians on all sides now. We can't even come up with a candidate better than Starmer and many don't seem to want him either.
Then some wonder why it's been downhill for the UK for years