Guido’s not sure calling Rishi “Mr 24 tax rises” in the same breath as attacking him for failing to impose a windfall tax is the slam dunk Starmer thinks it. As Rishi points out, Labour seem to believe this windfall tax is a bottomless well of cash. Although Sunak got his figures wrong: Labour haven’t promised to spend that money on “five different things“. They’ve promised to spend it on ten…