Brexit has driven a fissure through the middle of British politics, making it difficult or impossible to win an electoral mandate from the middle, as Theresa May has found. The traditional dynamics of two parties vying for the median voter has changed radically. Boris Johnson was arguably among the first to recognise that shift, and to position himself accordingly. But his plan hit a number of roadblocks: in our view, it is Plan 3.0 that has propelled him into Number...