For all their formidable physical presence, racehorses spook easily. A sudden gust of wind flapping a plastic sack, a page from yesterday’s Racing Post blowing across the stable yard can provoke a fit of the twitches: eyes rolling, nostrils flaring and back legs snapping out a lethal kick. Trainers need a capacity for quiet reassurance and you don’t need long at Clive Cox’s Beechdown Farm in Lambourn to be struck by its overriding calm.