1971: Captain Sir Ranulph Twistleton-Wykeham-Fiennes with his wife Virginia, 23, at Lyneham. The photo was taken before a Royal Scots Greys expedition to uncover the secrets of the notorious Headless valley, in northern CanadaPhotograph: PA1990: Taking part in the Anglo-Soviet North Pole expedition. He was Leader of the Pentland South Pole expedition, which achieved the first unsupported crossing of the Antarctic continent and the longest unsupported polar journey in history, in 1992/1993Photograph: PA Photos1991: Fiennes in Poles Apart, an episode of the TV programme Viewpoint 91. He took part in Transglobe, the first surface journey around the world's polar axis from 1979 to 1982, during which Fiennes and Charles Burton became the first people ever to reach both poles by surface travel. He then went on a North Pole unsupported expedition in 1986 Photograph: ITV/Rex Features