In 1975 he joined Sir Ranulph Fiennes and his wife Ginny at the Duke of York Barracks, Chelsea.
On the Transglobe Expedition he travelled with Fiennes and Charlie Burton on the 67-day Antarctic crossing, and acted as doctor, dentist, scientist and mechanic.
Because of family problems, he returned to the UK after the South Pole crossing, and worked in the office in London.
[3][4][5] Following Transglobe, Shepard was involved in a number of further polar expeditions, and also organised the trans-Antarctic crossing undertaken by Fiennes and Mike Stroud.
In later life he supported the Army Cadet Force (ACF) and the ABF, including sharing his experiences and his knowledge.