Prince Harry is about to set off on an Arctic mission, joining four wounded servicemen, on the first five days of their trek to the North Pole.
The prince is the patron of the charity Walking With The Wounded, and the aim of the mission is to raise £2m from the trek to help injured servicemen.
The 200-mile expedition is expected to take four weeks, and if succeeding, the team will the first disabled team to North Pole unaided.
Harry’s consists of four wounded soldiers, who all were injured in battle in Afghanistan.
Private Jaco Van Gass 24, had his left arm amputated as well as significant tissue loss to his left leg and bowel injuries when hit by a grenade; Captain Guy Disney, 29, had his right leg amputated below the knee after he also was hit by a grenade.
The right arm of Captain Martin Hewitt, 30, is paralysed after he was shot; and Sergeant Stephen Young was left with a broken back when his vehicle hit a bomb.
Each team member will be dragging a 100kg (220lb) sled, and temperatures could plummet to minus 45 on the trek.
The soldiers and Prince Harry will also be joined by two of the charity founders of Walking With The Wounded, Simon Dalglish and Ed Parker, as well as Norwegian polar guide Inge Solheim.