Postpublished at 22:07 British Summer Time 12 August 2017
Men's 4x100m relay
Colin Jackson
Two-time world 110m hurdles champion on BBC TV
That is the third fastest team in history.
They held the Americans off with ease.
GB win 4x100m relay gold from USA
Usain Bolt pulls up injured in final race
GB win silver in women's 4x100m relay behind USA
Mo Farah wins 5,000m silver behind Ethiopia's Muktar Edris
Johnson-Thompson 5th & Lake 6th in high jump
Australia's Sally Pearson wins 100m hurdles gold
Germany's Johannes Vetter wins javelin gold
France's Kevin Mayer wins decathlon gold
Tom Rostance
Men's 4x100m relay
Colin Jackson
Two-time world 110m hurdles champion on BBC TV
That is the third fastest team in history.
They held the Americans off with ease.
Men's 4x100m relay
I make that the 16th fastest relay ever, and GB the third fastest team behind Jamaica and the US.
Men's 4x100m relay
Steve Cram
BBC athletics commentator on BBC TV
This is a sad sight. A very sad sight.
Nobody wants to see a sportsman of that standing like this.
Men's 4x100m relay final
Usain Bolt is helped to his feet and he applauds the crowd. What a dramatic end to his career.
he bows out with 11 world gold medals.
Men's 4x100m relay final
It's a British record of 37.47 seconds for Great Britain.
Men's 4x100m relay final
Wow! There's all the drama of the night. Usain Bolt and Mo Farah end their track careers in disappointment.
Jamaica don't finish and that's a huge shame.
But it's gold for GB, silver for the US and bronze for Japan.
Men's 4x100m relay final
GB lead after the first 100m, with Adam Gemili going well too, Usain Bolt is going to have work to do...
GB win it!
USAIN BOLT PULLS UP INJURED
Men's 4x100m relay final
Men's 4x100m relay final
The British women - who just won silver - give a huge cheer on the sidelines. There is massive Jamaica support inside the stadium too.
Men's 4x100m relay final
Mike Rodgers leading out the US, Omar McLeod the hurdler for Jamaica, Chijindu Ujah for GB.
All eyes are on Usain Bolt 300m away though as he goes through his choreography.
Men's 4x100m relay final
The studio pundits predict a USA win here. Will Usain bow out on a silver like Mo?
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Men's 4x100m relay final
Michael Johnson predicts that Usain Bolt will be in third behind the US and Great Britain when he gets the baton.
Men's 4x100m relay final (21:50 BST)
Usain Bolt leads a dropped shoulder affair, and there are boos for Justin Gatlin. It's a smart salute for Turkey.
Men's 4x100m relay final (21:50 BST)
A choreographed bow from the Japanese men, China go guns up, GB just lap it up.
Men's 4x100m relay final (21:50 BST)
Usain Bolt has time to mess about with hero the hedgehog in the tunnel. This is his last ever race.
The greatest?
Men's 4x100m relay final (21:50 BST)
Jamaica have bought in Yohan Blake on the third leg with Usain Bolt on the anchor.
United States have Justin Gatlin second with youngster Christian Coleman taking on Bolt...
Men's 4x100m relay final (21:50 BST)
Here come the men.
A reminder of the British team:
Women's 4x100m relay
Men's 5000m
Steve Cram
BBC athletics commentator on BBC TV
It's been a great journey Mo. Thank you.
The smile is back and the Mobot is back..