My suspicion is that Leave would win with a slightly increased majority with the difference being among previous Remainers that just want the whole thing over and done with now - otherwise, I'd say opinions were pretty entrenched on either side. I'm more of a Remainer now than I was and I daresay there are some posts from me backing a second Referendum on here in the past five years, but my view straight after the result was that we should now get the whole thing sorted as quickly as possible and move on. That's proved easier said than done, but, on reflection, it's still my opinion today - I'm sure that there will be another Referendum some time in the future, but it should be a decade, at least, off yet.