Sir Ranulph Fiennes is receiving medical attention at Marathon des Sables . Veteran explorer , however , has completed most gruelling stage of the desert marathon . forced to lie down intermittently during last few hours so he could recover . determined to become the oldest person to complete the 60 - day ultra - marathon .
Sir Ranulph Fiennes is receiving medical attention at Marathon des Sables . Veteran explorer , 71 , has completed most gruelling stage of the desert race . Forced to lie down intermittently during last few hours so he could finish . Aiming to become the oldest Briton to complete the six-day ultra-marathon .