Boris Johnson enjoyed the backing of some heavyweight characters during his electoral campaign: the likes of Andrew Gilligan and James Whale were only to happy to heft their corpulent frames onto the Back Boris bandwagon, with Whale losing his radio show as punishment. A less sturdy source of support - an M&S trainer to the Wonderbras of Gilligan and Whale - came from Eighties pop crooner and ex-Kylie beau Jason Donovan. On April 27th,......