On Septemeber 24, 1975, Dougal Haston and Doug Scott became the first Britons to reach the summit of the world’s highest mountain. The men arrived at the top of Mount Everest via the previously unclimbed south-west face, 33 days after establishing their base camp.
Expedition leader Chris Bonington reported the pair had reached the 29,028ft (8,848m) summit safely and hoped more of the 18-strong group would be able to reach the top.
The south-west face of Everest has been regarded as one of the most difficult challenges in mountaineering because of its length and exposure to high-level winds.
The Queen sent a message to the team offering her warmest congratulations on a «magnificent achievement».