'doping' - tagged features

The Tour de France pushes off in London this week, a city notorious for its intolerance of anything on two wheels. But enthusiasm for the race has dwindled over the past few years, thanks largely to scandals involving competitors testing positive for performance enhancing drugs. The American Floyd Landis was crowned king yellow-jersey last year, but officially Landis is no longer the winner of the 2006 Tour de France, after he failed a drugs test.