© Licensed to London News Pictures. 26/06/2011. Henley-on-Thames, UK. Competitors waiting at the start line. Swimmers take part in the Henley Swim at dawn this morning (26/06/2011). The annual event sees competitors swim the length of the 2.1km course of the Henley Royal Regatta on the River Thames, after arriving in darkness, and walking half a mile to the start at sunrise. See special instructions. Photo credit should read: Ben Cawthra/LNP