- World Athletics Championships
Golden Bolt shines in relay, GB lose bronze
Usain Bolt added another gold medal to his impressive collection as Jamaica won the men's 4x100m relay final at the World Championships, but Great Britain after securing bronze were later disqualified following an illegal changeover.
The Olympic champion made it a record-equalling eighth gold at the Worlds as he led his nation home in a time of 37.36seconds ahead of the United States, but Great Britain were punished after doubts about the second changeover between Harry Aikines-Aryeetey and James Ellington were raised.
They had originally taken bronze, with Dwain Chambers running alongside Bolt on the final stint, but following the disqualification Canada have now been promoted to third.
Britain were set to end their event on a high following the double-double success of Mo Farah and the heroics of Christine Ohuruogu in the women's 400m, but the men's relay team will be bitterly disappointed with the dodgy changeover.
At the front, Bolt stormed to his third gold of the World Championships, adding to his 100m and 200m successes, and joins the likes of Michael Johnson, Allyson Felix and Carl Lewis to have won eight golds at the event.
Jamaica were also victorious in the women's 4x100m relay final, with Shelly-Ann Fraser-Pryce, like Bolt, taking her third gold of the competition.
Britain were in contention for a medal at the last changeover, but the United States and France moved ahead at the end to see them miss out on success. However, they were later promoted into the bronze medal position after France were disqualified.