The test stage for this training phase requires the candidates to undergo an evasion exercise, dressed in greatcoats to restrict movement and operating in small groups.
A greatcoat, fashioned in grey wool, would be worn and was normally tied on top of the haversack or knapsack which was carried by the men whilst on the move.
He suffered severe frostbite during the escape and had to have both his feet amputated, after this he was transported by being dragged on his greatcoat.