Why would a 13-stone man with weak ankles take up fell running, and what does it take to run up mountains for fun?

Richard Askwith is a desk-bound southern journalist – based in Northamptonshire – whose life was changed by a mid-life encounter with the unforgiving northern sport of fell-running.

A decade-and-a-half of running, stumbling, shivering and getting lost in Britain’s wildest mountains provided the raw material for his best-selling book, 'Feet in the Clouds: a Tale of Fell-Running and Obsession'.