Re: Landslide? ... 42% of the electorate voted Macron
"Brexit was a single-issue binary choice, not directly related to party politics. "
It wasn't though. It was a vote for independence if you ask Farage, for the NHS if you ask the Leave campaign, for democracy if you ask one of my friends, to send the blacks home according to the man in my local, against Turkey joining the EU if you ask Boris Johnson or just for a return to the good old days according to the landlord of the Dog and Muffler.
That was David Cameron's big mistake and Theresa May's Enabling Act. If the question had been one binary question it would not have gained anywhere near as much support.