Team GB disqualified from relay
British and Northern Irish athletes have been disqualified from the 4x100m final after initially claiming bronze at the World Athletics Championships in Moscow.
Team GB disqualified over the second changeover
Great Britain has lost its bronze medal to Canada after being disqualified over the second changeover in the 4x100m relay.
Dwain Chambers crossed the line third but the change between Harry Aikines-Aryeetey and James Ellington took place outside the designated box.
Canada was then awarded third place on appeal.
"It's heart-breaking," Aikines-Aryeetey said. "We found out when we were walking to the medal presentation."
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