Kenton Cool reflects on the ground-breaking 1922 expedition to Everest Base Camp.
"The 1922 British Everest Expedition was ground breaking. They smashed the previous altitude record, they were exploring new ground and using oxygen for the first time ever in a mountain environment. And when you consider all the equipment they were using, how rudimentary it would have been ... that expedition of 22 I think stands out above all others on Everest. Everything was new for them - they travelled literally for months to get here, all across India, into Tibet and round onto the North Side of Everest..."