The physical challenges to be overcome

1. The Lower Glacier
   • Has to be crossed at night while it is frozen.
   • Only one member of the team has a 'torch' - the rest are travelling blind.
   • The team must cross without falling into any of the crevasses that lurk in the glacier.
   • Team members must be at least one metre apart to avoid creating too much weight in one location.
   • Loud noises and any shouting can cause avalanche and icefall in this region.

2. The Great Crevasse
   • A bottomless crevasse lies at the head of the glacier.
   • The team must cross it to gain access to the Upper Snowfield.
   • Anyone touching the 'black of the crevasse' has fallen into the abyss.

3. The Upper Snowfield
   • A snow accumulation zone lies at the head of the glacier.
   • Travel is slow and the snow is deep.
   • Because of the altitude it is only possible for teams and individuals to make one physical movement every five breaths.