Richard Mansfield, a mountain guide who has worked in the area for 20 years and lives close to the Bossons glacier, said:
"I don't know exactly where the accident happened but all the trails on the north side of the valley are covered in snow. The footpaths usually don't get that many people out at this time of year because they are much more difficult to navigate, although yesterday was a beautiful sunny day."
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There will be some brightness, with the best of the sunshine towards the south and southeast where it will again be chilly.