PRESS ASSOCIATION -- David Walliams (http://www.huffingtonpost.com/2011/08/16/david-walliams-moons-on-a_n_927966.html) has set off on his most dangerous challenge so far - swimming the entire length of the Thames.The comedian and panel show host is raising money for Sport Relief by swimming 140 miles over eight days from Gloucestershire to London.More... (http://www.huffingtonpost.co.uk/2011/09/05/david-walliams-begins-140_n_949008.html)
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