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Princess Beatrice and Holly Branson on Mont Blanc climb

19 September 2012 Last updated at 12:03 BST

Princess Beatrice and friend Holly Branson have returned from climbing Western Europe's highest peak, Mont Blanc, to launch their new charity Big Change Charitable Trust.

The young royal said the charity provided inspiration to keep going and finish the climb.

They spoke to Tim Muffett at the Westway Climbing Wall in London about their challenging experience.

Climb footage courtesy of Sam Branson.