Postpublished at 20:21 British Summer Time 5 October 2019
The United States run a world-leading time and they messed up about two of their changeovers.
If they can get that sorted, then my word, they're going to be some team...
Summary
Live: Men's marathon - GB's Callum Hawkins competes
4x100m finals: Dina Asher-Smith wins third medal as GB take silver; GB's men also take silver
GB's Laura Muir fifth in women's 1500m final as Sifan Hassan storms to gold
4x400m relay heats: GB women into final; men advance after Botswana disqualified
GB's Shara Proctor & Abigail Irozuru qualify for long jump final
100m hurdles qualifying - GB's Cindy Ofili through; Olympic champion Brianna McNeal out after false start
Use play icon to watch live BBC TV coverage from Doha (UK only)
Postpublished at 20:21 British Summer Time 5 October 2019
Postpublished at 20:21 British Summer Time 5 October 2019
Zharnel Hughes is having to lean on Richard Kilty as the team huddle - he's tweaked something.
The British women's team come over to celebrate with them. That's two more silver medals on the flight back home.
Postpublished at 20:20 British Summer Time 5 October 2019
Men's 4x100m final
Colin Jackson
Two-time world 110m hurdles champion on BBC TV in DohaIt was not the best of changes from the USA so they still have room to improve but it was incredibly powerful and strong.
Britain should be very proud of that silver medal.
silver medal Silver medal - Great Britainpublished at 20:20 British Summer Time 5 October 2019
Men's 4x100m relay final
A fine final run and neck stretch from Nethaneel Mitchell-Blake sees him get over the line in 37.36.
Double silver for the Brits. Japan take the bronze.
gold-medal Gold medal - United Statespublished at 20:19 British Summer Time 5 October 2019
Men's 4x100m relay final
37:10!
Postpublished at 20:18 British Summer Time 5 October 2019
Men's 4x100m relay final
America are going to take gold, but Japan and Great Britain are duking it out for the silver...
Postpublished at 20:18 British Summer Time 5 October 2019
Men's 4x100m relay final
Ugh, that's scrappy from Zharnel Hughes to Richard Kilty and GB lose a bit of ground...
Postpublished at 20:18 British Summer Time 5 October 2019
Men's 4x100m relay final
Tidy from Adam Gemili and it's a decent changeover...
Postpublished at 20:17 British Summer Time 5 October 2019
Men's 4x100m relay final
Adam Gemili has the baton in his hand, his teammates prowling around the track.
Ready?
Set...
GO.
Postpublished at 20:17 British Summer Time 5 October 2019
Men's 4x100m relay final
That US line-up?
Christian Coleman, Justin Gatlin, Michael Rodgers and Noah Lyles.
This should be a good 'un...
Start listpublished at 20:15 British Summer Time 5 October 2019
Men's 4x100m relay final
Here's how they line up...
Postpublished at 20:14 British Summer Time 5 October 2019
Men's 4x100m relay final
Right then, a silver in the bag for Great Britain's women.
What can the men do...?
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End of twitter postPostpublished at 20:12 British Summer Time 5 October 2019
Women's 4x100m relay final
Colin Jackson
Two-time world 110m hurdles champion on BBC TV in DohaI was happy that Neita did so well, she held her form, held her composure and brought that baton home for a silver medal.
Postpublished at 20:12 British Summer Time 5 October 2019
Women's 4x100m relay final
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End of twitter postPostpublished at 20:10 British Summer Time 5 October 2019
Women's 4x100m relay final
Colin Jackson
Two-time world 110m hurdles champion on BBC TV in DohaAnytime you finish ahead of the United States it puts a big smile on your face. Jamaica won that off the first leg though Whyte.
It was a real benchmark of world-class sprinting.
Postpublished at 20:09 British Summer Time 5 October 2019
Women's 4x100m relay final
Steve Cram
BBC Sport athletics commentator in DohaAll the tactics meant we had a really good performance but it was not enough to be the Jamaica team.
Postpublished at 20:09 British Summer Time 5 October 2019
Women's 4x100m relay final
That's a third medal of the championships for Dina Asher-Smith.
Epic.
silver medal Silver medal - Great Britainpublished at 20:07 British Summer Time 5 October 2019
Women's 4x100m relay final
SILVER for Great Britain.
Ashleigh Nelson brought GB back into contention before Daryll Neita absolutely motored away from the USA to cross in 41.85.
The Americans win bronze.
gold-medal Gold medal - Jamaicapublished at 20:06 British Summer Time 5 October 2019
Women's 4x100m relay final
That was Jamaica's from the moment the starter's gun sounded. They win gold in 41.44.
What about the rest?
Postpublished at 20:06 British Summer Time 5 October 2019
Women's 4x100m relay final
Jamaica absolutely flying and GB have a lot of ground to make up to get in the medals.