But the Montane Winter Spine - with its single non-stop 268-mile stage along the Pennine Way - has emerged as one of the world's toughest challenges. Mr Hayday-Brown said: "We didn't realise when ...

Andrew Hendry / Montane Winter Spine Race Racers have to grab short sleep breaks wherever they can along the 268-mile route The first major running endurance races emerged on the back of the ...