Films about the Winter Olympics don’t grow on conifers. Twenty-five years ago there was Cool Runnings about the Jamaican bobsleigh team. It took many years for Eddie the Eagle to reach the screen. Both were cockle-warming comedies about implausible Olympians who embody the ideal that participation is all. Only last week Elise Christie, the British speed skater who kept tumbling in Pyeongchang (and Sochi), hoped that ‘Reese Witherspoon’ would play her in the movie.