The venerated trainer could not find a guru in the world to cure one of the greatest hurdlers in history but a surprise switch to the Flat promises a career swansong Nicky Henderson is 75 years old and, after almost half a century of training horses, he has seen everything in the strange and compelling world of racing. But the extraordinary and still evolving story of his great old horse Constitution Hill makes even Henderson pause in his study. It’s a sunlit afternoon in Lambourn and we’ve j...