Prince Charles, Prince of Wales and Camilla, Duchess of Cornwall stand for the national anthem at the Royal Variety Performance at London Palladium on November 25, 2013 in London, England. (Getty Images)
Prince Charles, Prince of Wales meets singer Jessie J as she attends the Royal Variety Performance at London Palladium on November 25, 2013 in London, England. (Getty Images)
Camilla, Duchess of Cornwall attends the Royal Variety Performance at London Palladium on November 25, 2013 in London, England. (Getty Images)
In this undated handout photo provided by Walking with the Wounded (WWTW) on November 26, 2013, Prince Harry, patron of Team UK in the Virgin Money South Pole Allied Challenge 2013 expedition and the Walking With The Wounded teams leave Novo, Antarctica for their second base camp at 87 degrees south, the starting point for the race and where further acclimatisation will take place. The Virgin Money South Pole Allied Challenge 2013, of which Harry is patron, will see the participants race across three degrees to the South Pole. All 12 injured service personnel from Britain, America, Canada and Australia have overcome life-changing injuries and undertaken challenging training programmes to prepare themselves for the conditions they will face in Antarctica. Trekking around 15km to 20km per day, the teams will endure temperatures as low as minus 45C and 50mph winds as they pull their 70kg sleds to the south pole. (Getty Images)
In this undated handout photo provided by Walking with the Wounded (WWTW) on November 25, 2013, Prince Harry, (R) patron of Team UK in the Virgin Money South Pole Allied Challenge 2013 expedition, pulling the pulk which is guiding US team member Ivan Castro, who is blind, as he takes part in ski training near Novo, Antarctica. The Virgin Money South Pole Allied Challenge 2013, of which Harry is patron, will see the participants race across three degrees to the South Pole. All 12 injured service personnel from Britain, America, Canada and Australia have overcome life-changing injuries and undertaken challenging training programmes to prepare themselves for the conditions they will face in Antarctica. Trekking around 15km to 20km per day, the teams will endure temperatures as low as minus 45C and 50mph winds as they pull their 70kg sleds to the south pole. (Getty Images)
In this undated handout photo provided by Walking with the Wounded (WWTW) on November 23, 2013, Prince Harry, patron of Team UK in the Virgin Money South Pole Allied Challenge 2013 expedition, and Dominic West make notes of how much each individual and their kit weighs, during preparations in Novo, Antarctica. The team of 12 injured service personnel from Britain, America, Canada and Australia have overcome life-changing injuries and undertaken challenging training programmes to prepare themselves for the conditions they will face in Antarctica. Trekking around 15km to 20km per day, the teams will endure temperatures as low as minus 45C and 50mph winds as they pull their 70kg sleds to the south pole. (Getty Images)
In this undated handout photo provided by Walking with the Wounded (WWTW) on November 23, 2013, Prince Harry, patron of Team UK in the Virgin Money South Pole Allied Challenge 2013 expedition, makes notes of how much each individual and their kit weighs during preparations, in Novo, Antarctica. The team of 12 injured service personnel from Britain, America, Canada and Australia have overcome life-changing injuries and undertaken challenging training programmes to prepare themselves for the conditions they will face in Antarctica. Trekking around 15km to 20km per day, the teams will endure temperatures as low as minus 45C and 50mph winds as they pull their 70kg sleds to the south pole. (Getty Images)
In this undated handout photo provided by Walking with the Wounded (WWTW) on November 23, 2013, Prince Harry (R), patron of Team UK in the Virgin Money South Pole Allied Challenge 2013 expedition takes part in ski training in Novo, Antarctica. The team of 12 injured service personnel from Britain, America, Canada and Australia have overcome life-changing injuries and undertaken challenging training programmes to prepare themselves for the conditions they will face in Antarctica. Trekking around 15km to 20km per day, the teams will endure temperatures as low as minus 45C and 50mph winds as they pull their 70kg sleds to the south pole. (Getty Images)