Celebrity SAS star Jason Fox leads a team on extreme ultramarathon in Sweden

Celebrity SAS star Jason Fox leads a team on a 500km (310 mile) ultramarathon across frozen wastes in northern Sweden. Foxy is the kind of hard man who sprinkles concrete instead of sugar on his morning Weetabix. His colleagues on the race included ex-Marine Aldo Kane, a man of such mental strength that he once spent ten days shut in a blacked-out nuclear bunker for a psychological experiment.