Meanwhile, back in London...

A stonking, dominate run from GB's Steve Morris, who leads from the gun and all the way to the line across the two laps.

He's into Saturday's final of the T20 800m, a race for athletes with intellectual impairment.

Image source, PA

Mike Costello
BBC athletics correspondent in Monaco

The World Championships are only two weeks away, and the 100m takes place over the first few days.

This is the last ever race for Usain Bolt outside of a major championships. The loudest cheer of the evening was when he appeared in the stadium. There is a real buzz here, he brings a sizzle to an occasion that no other athlete does.

And it is nearly time for the main man.

Usain Bolt has confirmed he will run the 100m and 4x100m relay at the World Championships in London in August, his final event before retiring.

Bolt, an eight-time Olympic gold medallist and an icon of world sport, has led one of the most illustrious careers in the history of athletics.

"My aim is to win in London. I want to retire on a winning note," the Jamaican 30-year-old said on Wednesday.

The World Championships take place from 4-13 August. The men's 100m final is due to take place on Saturday, 5 August, while the men's 4x100m relay race - which will mark the end of Bolt's career - takes place on the following Saturday.

Image source, EPA

Double Paralympic sprinting champion Liam Malone says he will use technology to run faster than Olympic legend Usain Bolt within the next three years.

Jamaican sprinter Bolt, who will retire this summer as an eight-time Olympic gold medallist, set the 100m world record of 9.58 seconds in 2009.

"I'm aiming for 9.4 seconds," New Zealander Malone, 23, told BBC Radio 5 live. He believes technological improvements to the blades used by amputee runners will bring down times.

"In the next three years I'll run faster than Usain Bolt over 100m," said Malone, who was born without fibula bones and had his legs amputated below the knee when he was 18 months old.

"It won't be done in the Paralympics, and I've no intention of ever racing Usain Bolt or able-bodied people, it's about racing against their time outside of the rules and regulations that limit technology. That's what I'm focused on at the moment."

Image source, Getty Images

A world lead time from Kenya's Hellen Obiri, an emphatic winner in eight minutes 23.14 seconds.

But a great performance from Great Britain's Laura Muir as she comes third with a new career best time of 8.30.64.

Fellow Briton Eilish McColgan is next, in fourth, in a time of 8.31.39, another career best from her. Stephanie Twell comes home 13th.

Chris Osborne
BBC Sport at London Stadium

Image source, .

Spotted hanging off the Orbit sculpture in the Olympic Park in Stratford today - two blokes.

Would I do it? No way. Can you blame me? Not at all.

With two laps to go in the 3,000m in Monaco, Great Britain's Laura Muir is in fourth position.

Allison Curbishley
BBC athletics expert on Radio 5 live at London Stadium

Well done to James Hamilton, that was so impressive.

He took that race on, he really did well in his first major championship and I am really impressed.

Image source, PA

A solid run from James Hamilton who finishes second in the men's T20 800m, a race for athletes with intellectual impairments.

Top three was good enough for the final.

It's Steve Morris up next.

We have a British trio in the women's 3,000m with Eilish McColgan, Stephanie Twell and Laura Muir three of the 15 runners.

Image source, AFP/Getty Images

Over in Monaco, it is an American one-two in the women's 100m hurdles as world record holder Kendra Harrison finishes in 12.51 seconds, one hundredth of a second in front of Sharika Nelvis, while Jamaica's Danielle Williams takes third in the 12.58.

That could be some race in the World Championships in London next month.

We have two British competitors in the heats of the men's 800m T20 as James Hamilton goes in heat one, before Steve Morris in heat two, with both men aiming to secure their places in the final on Saturday at 20:30 BST.

The pair took part in the 1500m race on Monday night, with Morris coming fourth and Hamilton finishing sixth as both runners set season's best times.

Image source, PA

Allison Curbishley
BBC athletics expert on Radio 5 live at London Stadium

That was agony, the finish line could not come quick enough for Paul Blake. He ran a measured 200m and I thought he had timed it right, but you could see him tighten up. That was heartache for him, finishing fourth.

Image source, PA

Image source, PA

The absolute pain on Paul Blake's face. The Rio gold medallist looked nailed on for silver as they came out of the final bend but just had nothing in the tank for the final 50m.

He was swallowed up by Keegan Pitcher of New Zealand, who came third, and second-placed Krzysztof Cuikzsa of Poland as Blake finished fourth.

Great Britain's Paul Blake bids to repeat his Rio success in the T36 400m at 20:03.

The 27-year-old is the reigning Paralympic champion at this distance and also won the world championship at 400m in Christchurch, New Zealand back in 2011.

He has tweeted a picture of his kit, which you can see below.

BBC Sport app users will need to click on the below link.

BBC Radio 5 live

And now you can join Allison and the rest of the BBC Radio 5 live team back in their customary positions, in the commentary booth.

Press the play button at the top of this page to listen along to the commentary.

Chris Osborne
BBC Sport at London Stadium

Image source, .

If you've been watching the World Para-athletics Championships you'll have seen these little remote controlled vans that are used to collect javelins and discus from the field.

Apparently they cost £2,000 each to make - although the Minis they used at Rio 2016 cost a few times more.

Here's BBC Radio 5 live's Allison Curbishley taking one for a test ride.

Para-athletics has gone from strength to strength in recent years but there's still work to do, especially in the field of coaching.

Statistics show, external nearly 20% of working-age people in the UK have a disability. But only 6% of sports coaches are disabled and of coaches who have gained a qualification since 2009, the number drops to 2%.

Here are the stories of some of unsung heroes helping to bridge the coaching gap...

Image source, UK Coaching

Chris Osborne
BBC Sport at London Stadium

Image source, EPA

A horrible end to the T11 200m final, for runners who are legally blind.

American David Brown, a massive fan favourite at the World Para-athletics Championships, falls just before the line and brings down his guide.

Image source, AFP/Getty Images

He's taken 100m gold here in London already, but there is confuson over this result, with French winner Timothee Adolphe possibly disqualified. If that's true, Brown will take silver.

Much more from Monaco later on, but let's head back to London now to see what is happening in the World Para-athletics Championships.