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."
More top news
Accompanied by the Duke of Edinburgh, the Queen will attend the opening ceremony of the fifth session in the Holyrood chamber.
Ms Leadsom has received the backing of Ian Duncan Smith, the former work and pensions secretary.
The former shadow work and pensions secretary is considered a more viable candidate than Angela Eagle, a Labour source has told ITV News.