"The expedition last contacted www.nieverest.com on Monday when Richard Dougan and David Sharp arrived at Camp 2, " expedition spokesman David Malone told BBC News Online on Thursday.

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The expedition will run From April 2 to April 16 and will include four surgeons and a team of other medical personnel.

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He adds that the data gathered during the expedition will also be used to calibrate the instruments on Esa's Cryosat-2 satellite, scheduled to be launched in 2009.

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Clayton Anderson, a member of the Expedition 15 mission to the International Space Station, can be seen dancing at about the 2:30 mark.

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The rest of the team will continue with their 2, 000-mile (3, 219km) trek as part of the "Coldest Journey" expedition as they aim to become the first people in history to cross the Antarctic in winter.

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