Here’s how it would work.
David Cameron resigns as he has said he would and calls a general election.
Boris Johnson succeeds him as leader of the Conservative party.
Corbyn, or whoever else is leading the Labour Party runs on the platform of not invoking Article 50. Johnson has no option other than to rerun his Leave campaign.
The 28% of people who didn’t vote in the referendum realise what a mistake has been made and vote for the Labour Party. A significant portion of 51% who voted for Leave realise what a huge mistake they have made and vote for the Labour Party.
The result is a landslide to remain in Europe.
It may be a pipe dream. But it is a solution.