The south face of Annapurna was first climbed in 1970 by Don Whillans and Dougal Haston also without using supplementary oxygen, members of a British expedition led by Chris Bonington that included the alpinist Ian Clough, who was killed by a falling serac during the descent. They were, however, beaten to the second ascent of Annapurna by a matter of days by a British Army expedition led by Colonel Henry Day.