Next up on the track is the women's 400m heats.

Jodie Williams, Ama Pipi and Nicole Yeargin are the GB athletes seeking to reach the semi-finals.

There are six heats to come, with the top three places in each offering guaranteed progress.

Steve Cram
Athletics commentator on BBC TV

Jake Heyward has run a brilliant race.

I'm so impressed with Jake there. He looked good following McSweyn in the home straight, he had swagger, he looked comfortable.

Brilliant stuff from Deborah Kerr!

The Briton finishes in second place to book her spot in the final, which takes will start at 03:37 BST.

Hungary's Dora Lucz takes the win.

BBC One

Here's Jake Wightman, who finished third in his 1500m heat: "You've got to compromise a bit with running wide here. You saw the falls there - you can get caught up in it. It felt pretty smooth for me so I can't complain.

"You underestimate how hot it's going to be in here, that's the biggest shock. The sun's out in the morning and it's much harder work than it should be, I'm glad that the next race is in the evening.

"I feel like I'm in the best shape of the season. Whatever happens happens, but let's get to the final first."

Now it's over to the canoe sprint, as GB's Deborah Kerr aims for a place in the final.

Here we go!

And those times in the final 1500m heat mean Josh Kerr also secures his place in the semi-finals.

Three from three for GB. Job done.

Australian Stewart McSweyn sets the pace going into the final lap, and only GB's Jake Heyward goes with him down the back straight!

Heyward takes no chances, putting his foot down to win the heat in three minutes 36.14 seconds ahead of Ethiopia's Teddese Lemi. Jakob Ingebrigtsen finishes fourth.

BBC One

Josh Kerr speaking on BBC One: "It was poor all round. I got caught in the middle of things. I made a big move with about 500m to go, which in hindsight probably wasn't the smartest - I should have waited. It's just the way it goes sometimes. I have a tough wait here but hopefully I can scrape through and do some damage in the semis. It's not good enough, really.

"I felt good, it's just that sometimes heats just don't go to plan. I knew I was in trouble with 100m to go and I was scrapping for places. That's racing and I put myself in that position so I can't be too annoyed. It's not what I'd planned."

The third and final 1500m heat sees Jake Heyward bid for a semi-final spot.

Talented 20-year-old Jakob Ingebrigtsen of Norway is also in this one.

Steve Cram
Athletics commentator on BBC TV

There's a faller... It's Marcin Lewandowski! Lewandowski is gone... and another faller! They're going down like ninepins.

It was all happening about 250m out. You know there will be a protest here.

Over in the men's triple jump qualification, GB's Ben Williams sits 11th in his group after a best leap of 16.30m after two attempts.

Absolute carnage on the final lap!

Poland's Marcin Lewandowski takes a tumble and he's not the last to do so.

But at the front, GB's Jake Wightman secures his place in the semi-finals with a third place finish behind Abel Kipsang and Matt Centrowitz.

Rio 2016 gold medallist Matt Centrowitz is looking nice and relaxed in second place with two laps to go.

It's all very bunched up and Jake Wightman tries to edge his way out of trouble. Tense moments.

Next up, Jake Wightman contests heat two.

He's joined by defending champion Matt Centrowitz of the USA, with Kenya's Abel Kipsang also in the mix.

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

I'm not even sure Josh Kerr ran out of steam down that home straight. He was thinking, 'I'm easily in the top six.' He didn't read the danger from the likes of Ingebrigsten and he should have done.

Image source, Getty Images

Steve Cram
Athletics commentator on BBC TV

Josh Kerr! All the talk about Josh Kerr, I'm not sure he possesses the ability to always read races well...

He put himself in the right position today, he just didn't finish as well as he would have liked to. You have to be able to be strong in that home straight once you've put yourself in a good position.

Ah no! Josh Kerr looks well in the mix for a top-six finish, in second place as the pack enters the final straight - but he just loses out in the final metres and finishes seventh in three minutes 36.29 seconds.

Fingers crossed that's enough to sneak him through to the semi-finals as a fastest loser. Belgium's Ismael Debjani wins the heat, ahead of Kenya's Timothy Cheruiyot.

Timothy Cheruiyot pushes the pace at the front heading into the final lap, and here comes Josh Kerr to the front looking to secure his place in the top six finishers...

The first 1500m heat is under way!

Josh Kerr is getting stuck into this one, alongside Kenya's Timothy Cheruiyot and Norway's Filip Ingebrigtsen. Tasty.

There's plenty of British interest in the men's 1500m heats.

Josh Kerr, Commonwealth and European bronze medallist Jake Wightman and Welsh record holder Jake Heyward are spread out across the three races, which also include the likes of defending champion Matt Centrowitz, European record holder Jakob Ingebrigtsen and Kenyan world champion Timothy Cheruiyot.

The top six in each heat will secure a semi-final spot, along with the next six fastest.