© Licensed to London News Pictures. 24/09/2016. London, UK. Participants warm up at the start of the first ever Swim Serpentine, held in the famous lake in Hyde Park.  Raising thousands for charity and with water temperatures of 18C, swimmers navigate the one mile clockwise route around the lake.  The two-day open water swimming festival includes the British Open Water Swimming Championships on Sunday. Photo credit : Stephen Chung/LNP
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