Lance Armstrong stripped of his seven Tour de France titles
24 August 2012 Last updated at 16:26 BST
Lance Armstrong has been stripped of his seven Tour de France titles and given a lifetime ban by the United States Anti-Doping Agency.
USADA decided he used performance-enhancing drugs to achieve his success.
Armstrong, who strongly denies doping, announced earlier he would not contest doping charges against him.
Gary Imlach has been the face of Channel 4 and ITV4's coverage of the Tour de France for the last two decades.
He spoke to the BBC Radio 4's World at One programme.