TORY PM David Cameron was braced for a miserable night yesterday as his party’s right-wing revolt to turn into a by-election nightmare in Clacton.

Douglas Carswell was set to canter home to become Ukip’s first ever MP after switching parties last month.

But Ed Miliband was poised to celebrate his party holding off a determined Ukip challenge to retain the Heywood and Middleton seat, where the Tories are expected to finish third.