52% in 2016 but falling rapidly, as far as the YouGov polls go.
Actually, I have a theory...
May and her criminal coterie are happy that everything is turning to shit on a daily basis. She did want Brexit, but has realised that it's impossible in any meaningful way. Problem: how to get out of it without ending up dangling from a (metaphorical) lamp-post with a howling mob waving pitchforks around her ankles.
Answer - blame someone else.
There's an interesting court challenge underway at the moment that claims that Art50 should not, constitutionally, have been invoked, and the blatant expenditure fraud by Leave means that the whole referendum should be annulled.
Perfect opportunity for May. "Oh, pooh, blasted judiciary, but the law is the law and must be obeyed. I better withdraw Art 50".
Shit-storm obviously follows, but at least not national bankruptcy, and May may manage to escape in an open boat in the confusion.