Steve Cram
BBC athletics commentator on BBC One

What a finish! That was incredible!

Plenty of pushing and shoving down the back straight, it's maybe a eight-man push for a win in the slow heat. What a finish!

Blanket finish! Pick the bones out of that lot. Josh Kerr was nowhere.

Brendan Foster
Olympic medallist and BBC commentator on BBC One

Young Josh Kerr - this is where he will learn his trade. It's great to see a 19-year-old athlete at the start of his career.

It's not a Diamond League where you have a pacemaker - this is a slow pace.

It's a very slow opening lap of 63 seconds. Tactical? Josh Kerr is at a disadvantage maybe by going in the first heat. If he misses out on the top six then he may need a quick time to be one of the six fastest losers.

Jonathan Edwards
Two-time world champion and triple-jump world record holder

I think if I'm honest Christian Taylor's not as in good shape as in previous years. I spoke to Dwight Phillips, who is the four-time world long jump champion. He thinks that Will Claye is in better shape.

I'd rather Taylor doesn't break my world record [18.29m] when I'm here.

Josh Kerr, a 19-year-old Brit, goes in the first 1500m heat. The top six go through by right.

Image source, Getty Images

Image source, Getty Images

Britain’s Josh Kerr is one of three Scots in the 1500m line-up. He has a tough heat which includes Kenya’s Asbel Kiprop who has the chance to emulate Hicham El Guerrouj’s four consecutive 1500m World Championship victories in London.

Kiprop has struggled for form in 2017 unlike his compatriot Elijah Manangoi, whose world-leading time of 3:28.80 in Monaco on 21 July moved him inside the all-time top 10.

Big! She needed this at the weekend but c'est la vie.

Katarina Johnson-Thompson clears 1.92m. She needs two more centimetres for auto qualification.

Can Christian Taylor come close to breaking the world record tonight? The sun is out which helps. He wears a wristband with 18:30 on it!

Image source, Getty Images

Two athletes have already cleared 1.92m. A reminder that you need a tough 1.94m to qualify automatically.

Image source, Getty Images

The last worlds were won at a height of 2.01m.

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

Adelle Tracey has made huge strides this year.

She will get to that sub-two minute soon. She did absolutely the right thing by battling hard and sticking with Buchel and getting that PB.

Katarina Johnson-Thompson has now cleared 1.89m at the second attempt.

Adelle Tracey lit the flame at London 2012 and she has to work hard in a fast race.

She hangs on to take a gutsy fourth, just outside of the top three but that's a quick time!

Francine Niyonsaba is expected to be the biggest threat to Caster Semenya in the final and you can see why. She makes it look easy, winning in 1:59.86.

It's 2:00.28 for Adelle! A PB and that will send her through.

Tom Fordyce
Chief sports writer at London Stadium

The 12 finalists for the triple jump are out on the far side of the stadium warming up and measuring their run-up marks. Christian Taylor, one of the nicest men in the sport, will start as the big favourite - but if you think it's been straightforward for the 2012 Olympic champion to keep that form going, consider this: because of knee injuries, he had to switch his lead jumping leg after that triumph.

What used to be hop (left foot), step (left foot) and jump (right foot) is now right-right-left. Try batting left-handed if you're a life-long right-hander or learning to kick predominantly with your wrong foot if you think that's easy.

Adelle Tracey goes in heat six for GB.

Charlene Lipsey of the US takes the fifth heat with ease, as Irish runner Siofra Cleirigh Buttner can only finish sixth.

Below is Lynsey Sharp making, er, sharp work of qualifying.

Can American two-time Olympic champion Christian Taylor break Briton Jonathan Edwards' 22-year-old world record? He came within eight centimetres of it in Beijing two years ago.

If you are too young to remember Edwards' record-breaking afternoon you can see it here.

Sensational.

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

It was encouraging to see Lynsey not panicking. That will do her a lot of good going into the next round.

Lynsey Sharp talking to BBC Sport: I've been fortunate to have a couple of boys to train with instead of being on my own - that's helped a lot. You can only think of each round at a time. You have to run the semis like a final.

This season has been up and down. I've persevered and I'm almost back to my best.

Morgan Lake has cleared 1.89m, KJT has failed at it.