Described as ‘the Sir Edmund Hillary of swimming’, RSGS Mungo Park Medallist Lewis Pugh has pioneered swims in the world’s coldest and most vulnerable climates, tying his passion for swimming with his advocacy for human rights and environmentalism as UN Patron of the Oceans. Clad in nothing but Speedos, goggles and a swimming cap, he has swum across a glacial lake on Mount Everest, was the first person to swim across the North Pole, and undertook a multi-day swim in the Polar Regions, across the Ilulissat Icefjord, to awaken people to the threat of melting sea ice