Lewis Gordon Pugh Prepares For Thames Challenge

LONDON - JULY 10: British Lawyer and endurance swimmer Lewis Gordon Pugh, 36, practices swimming in the River Thames on July 10, 2006 in London, England. Pugh is seeking to add another 'first' to his long list of pioneering achievements by attempting to become the first person to swim the entire length of the River Thames from its source near the Welsh border all the way to the North Sea, a distance of 325km/203miles, to raise awareness for climate change in partnership with the World Wildlife Fund. His challenge begins on July 17. (Photo by Scott Barbour/Getty Images for Investec)