Some Routemasters just don't know when to retire. While Boris considers his pledge to resurrect a modernised Routemaster, the original omnibus gets an artistic outing at the London Transport Museum. The double-decker is celebrated in a photographic exhibition by Ralf Obergfell, a German-born artist with a deep affection for the curtailed London icon. Last Stop opened this weekend and runs till 27 July. Meanwhile, Travis Elborough, author of The Bus We Loved, will give a......