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He had planned to ski Y Gulley or Diagonal Gulley from the Cairngorm Plateau.

Jia Jun Philip Zhu, known as Phil, from Liverpool, was walking on Tryfan in May with his two younger brothers when he fell down the mountain into a gulley, an inquest at Ruthin Coroner's Court in Denbighshire heard.

The photo taken by Dr Jason Gulley, who is also a geologist, is among several highly commended in this year's Wildlife Photographer of the Year.

“If it’s not integrated with a crisis response system that can be pushed electronically to the dispatch center and police, then it’s probably not going to mean anything to them in the first minutes,” said Jeremy Gulley, the school system superintendent of Jay County, Indiana, which uses a Centegix mapping and alert system.

Roughly 10 million cubic metres of earth fell suddenly from a gulley onto the Copler mine site on Tuesday.