Frederick Fennessy, from Oxfordshire, has spent five years preparing for the 870 mile (1400km) trek.

Russ Cook, nicknamed “Hardest Geezer”, teases a challenge of running from South Pole to North Pole.

Rebecca Openshaw-Rowe and Georgina Gilbert - the Antarctic Fire Angels - did the trek in 52 days.

Dave Thomas, 68, treks unassisted across the polar ice for almost two months to reach the pole.

Preet Chandi completes a solo ski expedition, which she says breaks her third world record.

Dave Thomas could soon become the oldest person to ski unsupported to the South Pole.

Eric Larsen is the only person to ever trek the North Pole, South Pole and Mount Everest in the same year.

Prof Chris Imray is researching the impact of polar activity on human metabolism.