It's not as cold as it ought to be.....

Lewis Gordon Pugh, an environmental campaigner, has swum 1km across a glacial lake on Mount Everest to highlight the impact of global warming.

He only wore swimming trunks, goggles and a swimming hat to face the 2C waters of Pumori Lake at 17,000ft (5,300m).

Pugh has been nicknamed the “human polar bear” for his cold water swims.