Watch High Altitude online: Episode 7 Episode 7

Graham and Ed invite Duran Duran frontman, Simon Le Bon and his brother Jonny, to a frozen lake in Sweden in a quest for sailing supremacy - on ice. They will fly across the ice on catamarans at speeds of up to 100kph in an exhilarating - and potentially very dangerous competition. We then set Ed and Graham the challenge of accessing the highest mountain peaks using natural means only, such as animals and wind - instead of cable cars and helicopters.

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