"When somebody comes up with a progressive idea, to begin with, you're mad, bonkers. Then if you go on, you're dangerous. Then there's a pause. Then you can't find anyone who can say they thought of it in the first place. That's how progress is made. This is why I do believe in the vote. In the end, all these people who've been tempted to the right realise the warning lights in their constituency are brighter than the bright lights from No. 10 offering them things."