A team of climbers led by a former Gurkha soldier from Hampshire, has become the first to conquer the world's second highest mountain in winter.
Nirmal 'Nims' Purja, a former British Special Forces Soldier', reached the summit of K2 at midday on Saturday, UK time.
They took the last few steps singing the Nepalese national anthem.
K2 is notorious for its perilous conditions. It is nicknamed Savage Mountain.
Until yesterday, reaching the 28,251 ft peak in winter was believed to be humanly impossible and had never been accomplished. It was famously known as the ‘last great mountaineering challenge’.
Temperatures can plummet to -80F (-62C) and wind speeds can top 120mph.
Only last week an attempt had to be abandoned because one of their camps was destroyed in high winds. Mr Purja and his nine team members had to sleep in a shallow crevasse at one point as it was too windy to put up their tents.
Nirmal Purja, Expedition leader:
Having reached the summit, the ten climbers then had to descend in darkness. All made it safely back to camp.
Attempts to summit K2 are normally made in July or August, during the warmest periods – only 280 people have reached the summit of K2 in a favourable Spring climbing season, compared to 3,681 who have made it to the top of Everest. 87 people have died while trying to climb K2.
Mr Purja's achievement comes a year after he smashed the world record for climbing the 14 tallest peaks in the world in the shortest time, completing the challenge in 189 days.