As Knockhill racing circuit in Fife turns 50, Mark Stephen hears how farmer Tom Kinnaird turned his sheep farm into the home of Scottish motorsport. Over the last five decades, Knockhill has been the breeding ground for champions such as Formula 1 driver David Coulthard and superbike rider Niall MacKenzie, but triple British Touring Car champion Gordon ‘Flash’ Shedden gives Mark the full Knockhill experience as they hurtle around the track at over 100mph.