The body of climber missing on Mt Everest has been seen, bringing the death toll from the weekend to four, Nepali officials say.
"You've got to be very respectful of the mountain because it can kill you," British climber Kenton Cool, who has reached the Everest summit nine times and is in the middle of his tenth attempt, told the Today programme.
He warns of "bottlenecks" forming in some areas on the way to the summit, causing people to wait with little oxygen in the "death zone" above 8000m.
Professor Chris Imray, a specialist in altitude sickness who has also climbed to the summit of Everest, told the Today programme that many people try and climb the Everest without the correct experience.
It is difficult to bring rules and regulation to climbing, he says, but trying to limit the number of people on the mountain at any one time "would make sense".
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