LONDON — Britain’s electoral map is being redrawn once again by Nigel Farage. His Reform UK insurgency is fracturing politics — and Keir Starmer is emerging the biggest loser of it all. But even as the right prospers, left-wing populists in the Green Party are also making big gains off the back of the prime minister’s unpopularity. All in all, a chaotic picture is being painted as votes are counted in elections for a swathe of English councils as well as devolved parliaments in Scotland and