LONDON, ENGLAND - SEPTEMBER 07: Daniel Dangoor abseils down the skyscraper known as 'The Gherkin' during the Outward Bound Trust's and the RoyaL Navy and Royal Marines Charity's most daring stunt: The City Three Peaks Challenge, on September 7, 2015 in London, England. (Photo by Mary Turner/Getty Images for the Outward Bound Trust and the Royal Navy and Royal Marines Charity)