Caroline Lucas: The right hon. Gentleman is making a compelling case. I imagine that, like me, he gets a steady trickle of emails from Brexit supporters, all of whom say that the 17.4 million people who voted leave in June 2016 knew exactly what they were voting for, because the right hon. Member for Uxbridge and South Ruislip (Boris Johnson) had spelled it out for them. Yet the former Foreign Secretary now...