Dogs race past punters in the 480 metres Champion Hurdle Final at Wimbledon Stadium in London June 11, 2011. In 1947, 60,000 spectators were recorded at the Derby at White City, one of 21 greyhound tracks then operating in London. In 2011 the Derby was held at Wimbledon Stadium  now the only dog track left in London and attendance was just 2,423. Picture taken June 11, 2011. REUTERS/Chris Helgren
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