Steve Cram
BBC athletics commentator on BBC TV

Eilidh Doyle ran an amazing third leg but tired a little at the end.

Emily Diamond has run out very hard. There is a silver medal if she is sensible.

Emily Diamond is on the anchor leg for Britain. Can she hang on for silver?

Image source, Reuters

Steve Cram
BBC athletics commentator on BBC TV

I really wanted Zoey Clarke to be about five metres ahead of where she was there.

But Neilson will be part of this team for years so just get used to watching her.

The USA are miles clear. Eilidh Doyle has dug in though to pull away from Poland.

The silver is on!

Don't talk to Jamaica about relays.

GB are in second place at the start of the third leg. The USA are away and gone.

Sporting phrases you only hear every year or so: 'the stagger will unwind after the end of the first leg."

Up there with 'where's the cue ball going?'

The US are already well clear and Jamaica ARE OUT!

Anneisha McLaughlin-Whilby has pulled up.

In Beijing two years ago it was Jamaica who won it from the US, with GB in third.

GO!

Denise Lewis
Olympic heptathlon gold medallist on BBC TV

This is a definite medal opportunity and a great opportunity for these young athletes to get great championship experience for this next Olympic cycle.

Here we go then, GB have won two bronze medals and one silver at the last three World Championships.

Another medal?

1. Zoey Clark
2. Laviai Nielsen
3. Eilidh Doyle
4. Emily Diamond

Allyson Felix is in the US team so it looks like she might win a ridiculous 11th world gold.

Phenomenal.

Image source, Getty Images

In qualifyingQuanera Hayes, a world indoor bronze medallist, led from the front in the first heat for the Americans, gaining a first leg lead her teammates only extended to qualify fastest overall in 3:21.66 minutes – a world-leading time.

Natasha Hastings, who finished fourth in the 400m in Rio, also featured in the heats and the US team could be strengthened for the final by the addition of 10-time world champion Allyson Felix.

Jamaica won the second heat in 3:23.64 minutes to qualify second fastest, as the reigning champions go for a second successive World Championships gold. Stephenie Ann McPherson, an individual bronze medallist at the 2013 World Championships, anchored the win.

Does Norwegian athlete Filip Ingebrigtsen have to be nervous? Make your own minds up about his finish here...

Image source, Getty Images

Great Britain are looking for a fourth successive podium finish having won two bronze medals and one silver at the last three World Championships. They qualified in second in their heat but a long way behind Rio gold medallists, the USA.

Paula Radcliffe
Women's marathon world record holder on BBC TV

That wasn't the Chris O'Hare we have seen all season. At his best, he could have been up there challenging for that bronze.

Let's be honest though, Ingebrigtsen is lucky to have gotten away with that - if he actually has gotten away with it.

Image source, PA

There's a hedgehog in the studio. Mic him up.

That's the end of the contest as Mutaz Barshim cannot get over 2.40m. He takes gold in 2.35, Danil Lysenko takes silver and it's a bronze for Syria and Majd Eddin Ghazal.