Noel Ewart Odell FRSE FGS was an English geologist and mountaineer. In 1924 he was an oxygen officer on the Everest expedition in which George Mallory and Andrew Irvine famously perished during their summit attempt. Odell spent two weeks living above 23,000 feet (7,000 m), and twice climbed to 26,800 feet (8,200 m) and higher, all without supplemental oxygen. In 1936 Noel Odell with Bill Tilman climbed Nanda Devi, at the time the highest mountain climbed.

George Herbert Leigh-Mallory was an English mountaineer who participated in the first three British Mount Everest expeditions from the early to mid-1920s.