Re: What would happen if...
"What would happen if someone ran for PM on a platform of NOT invoking article 50?"
I don't think that's how our system works. You don't vote for a PM - you vote to choose your MP - or in the case of where I live - to quote the late great Alan Beresford B'Stard - the hat stand with a blue rosette. Then all sorts of stuff happens that results in someone in a shiny suit that you wouldn't trust to run a bath let alone run a country being put in charge...
But theoretically, say if you could run it that way - well isn't that what the referendum we just had was all about. David Cameron basically said that a vote for REMAIN was also a vote for him. And look where that got us.
Biting the hand that feeds IT
