Jamaica Win 4x100m Gold As Britain Suffer

Usain Bolt took his World Championships career medal tally into double figures by anchoring Jamaica to gold in the 4x100 metres relay, as the British quartet were thrown out of the bronze medal position.

Bolt claimed his third gold of this year's championships by taking the Jamaica team home in 37.36 seconds.

Nesta Carter, Kemar Bailey-Cole, Nickel Ashmeade and Bolt finished well clear of the United States, who won silver in 37.56sec.

Dwain Chambers came flying down the home straight to earn Great Britain third place and, provisionally at least, the bronze.

The quartet of Adam Gemili, Harry Aikines-Aryeetey, James Ellington and Chambers clocked a season's best 37.80secs, the veteran anchor-leg runner chasing down Germany to claim third.

However, the second changeover from Aikines-Aryeetey to Ellington looked like it might have taken place out of the box and that was later confirmed, leading to the British quartet's disqualification. Canada were subsequently awarded the bronze (37.92).

Chambers said: "It is emotional. This is sport and it is just unfortunate that we were not able to experience what these guys are experiencing on the podium.

"All we can do now is get back home, build our team spirit back up again and move on to next year."

After wining his latest gold, Bolt performed a Cossack dance on the track for the Luzhniki Stadium crowd.

Addressing the crowd, he said: "I am very satisfied. It's a wonderful energy that's coming out."

Bolt has now won 10 World Championship medals, eight gold and two silver, to equal Carl Lewis' men's record.

A year after failing to earn a place at the Olympics, Great Britain's 4x100m women's team were handed the bronze medal after France were disqualified, the world governing body the IAAF announced hours after the race finished.

The French were disqualified following a protest from the British for 'changing outside their sector on the second baton exchange' and had an appeal against the disqualification turned down.

The British took the bronze instead, although their 'victory' came too late for the medals ceremony, while the Americans moved up to silver.

Britain's young quartet of Dina Asher Smith, Ashleigh Nelson, Annabelle Lewis and Hayley Jones finished 0.12 seconds behind the United States.

Bolt Wins On Return To Olympic Stadium

Usain Bolt recovered from a sluggish start to make a winning return at the Olympic Stadium one year on from his triple triumph at London 2012.

The Jamaican, who earlier entered the stadium for a lap of honour on the back of a "rocket", struggled out of the blocks before recovering to run a time of 9.85 seconds - his fastest 100 metres of the year.

However, there remains plenty of room for improvement for the 26-year-old ahead of next month's World Athletics Championships in Moscow.

American sprinter Mike Rodgers took second place in 9.98 seconds but there was disappointment for Great Britain's James Dasaolu, who withdrew from the race as a precaution after a twinge in the warm-up.

Jamaican athletics has been shrouded in scandal in recent weeks, with leading sprinters Asafa Powell and Sherone Simpson both testing positive for banned substances, but there was better news on the track in London.

The Caribbean island took a one-two finish in the men's 200 metres, with Warren Weir easing home in 19.89 seconds, ahead of his compatriot Jason Young. 

Earlier, Britain's Perri Shakes-Drayton ran a personal best to finish second in the women's 400 metres hurdles, behind Czech athlete Zuzana Hejnova.

The outstanding field performance of the night came from Ukrainian high jumper Bohdan Bondarenko, who threatened the 20-year world record set by Javier Sotomayor of Cuba.

Having failed at his only attempt to clear 2.43 metres, Bondarenko asked for the bar to be raised to 2.47 as he aimed to surpass Sotomayor's record of 2.45.

The 23-year-old failed twice but still won the competition with his earlier clearance of 2.38.