A red card for American Sean McLean. He's off for that false start in lane one. 

And there's another delay as interference from the PA system is making a weird noise. 

Awkward. 

Adam Gemili of Britain shows us his trademark smile and gets a loud reception as his name is read out of the tannoy.

And then the whole place goes ballistic as Usain Bolt does his trademark lightning arms in front of the camera.

Yep, it's buzzing out there at the Olympic Stadium. The crowd are well up for this showpiece. 

They're on their marks...and they're off! Oh, no they're not. False start. Back they go. 

From one record holder to another...

Usain Bolt, who if you remember won triple Olympic gold in London 2012, has good memories of the unique atmosphere inside the stadium at the Queen Elizabeth Olympic Park.

“I really enjoy competing here in London because the crowd is always magnificent and energetic. I always love competing in front of an energetic crowd.

“It means the world to be back here. The crowd is always going to be great, one thing I really appreciate here is that the track is wonderful and it’s going to be a great competition.”

And the man himself is about to take to the track again. Brace yourselves, people. 

Colin Jackson
Two-time world 110m hurdles champion on BBC Two

That looked like hard work for Jimmy Vicaut. He had to haul himself through the field to win in only 10.02.

I think all of them will be disappointed when they look at the clock.

As predicted, Jimmy Vicaut pulls himself over the line to take the victory...but it's a slow one for the 100m final. 

The Frenchman clocks 10:02 ahead of Isiah Young of USA in second and Churandy Martina of the Netherlands in third. 

It's all go here. 

Time for the men's 100m final. Frenchman Jimmy Vicaut the favourite for this one, after he topped the heats.

CJ Ujah of Britain is involved as well, along with Richard Kilty. 

We have a dodgy start, but the green marker is up so none of the athletes are at fault for it. 

Let's try again...

Athletics icons Michael Johnson and Usain Bolt discuss the Olympic champion's preparation for Rio and which of them would win a head-to-head 200m race.

Laura Muir on BBC Two: "I knew I was in good shape and wanted to test myself and see what I could do. I am so thrilled to get the record.

"It's amazing to run a British record here at the London Olympic Stadium. I am over the moon.

"Rio is my first Olympics, and it'll be different. It won't be as fast and it'll be tactical and scrappy but I am ready."

A brilliant run from Scot Laura Muir. She's clear out in front and looks dumbfounded as she crosses the line first. 

The 23-year-old finishes in 3:57.49 to snatch the British record off the one and only Dame Kelly Holmes. 

Sifan Hassan of the Netherlands comes in second (4:00.87) and Meraf Bahta of Sweden (4:02.62) in third. 

Image source, Getty Images

We're on the final lap of the women's 1500m and Laura Muir of Britain is out in front, closely followed by Sifan Hassan of the Netherlands. 

The crowd are screaming for Muir!

It's not all about Usain Bolt in the men's 200m. 

The dude with the biggest smile in British athletics - Adam Gemili - is also on the bill.

The 22-year-old endured a difficult time with injury last year but produced a champion's display to take the British 200m title in Birmingham last month and in turn claimed his place at Rio. 

He pulled out of the 100m tonight to concentrate on his better event. 

Let's see if he can offer a challenge to the fastest man in the world...

Image source, Getty Images

Kendra Harrison on BBC Two: "Not making the Olympic team I was really upset and wanted to come here and show what I could have done. I had vengence on my mind and wanted to show the girls what I had.

"I trained so hard for his moment. Good luck to the girls running in Rio, but I am just shocked now."

Image source, PA

Colin Jackson
Two-time world 110m hurdles champion on BBC TV

This is a world-class field and she destroyed it. It's always great to witness history and we saw it here in London.

A huge win for American Kendra Harrison! A new world record!

She drops to her knees in tears as she realises she's just run 12:20. Incredible. 

Harrison, remember, ISN'T going to the Rio Olympics, as she didn't finish in the top three in qualification. A bitter sweet moment for the 23-year-old.

Jessica Ennis-Hill comes in eighth - finishing last after a horrible tumble from Jasmin Stowers sees her retire. 

Tiffany Porter comes in sixth for Britain. 

Image source, Reuters

Jessica Ennis-Hill is pacing the start line as she prepares for the women's hurdle final.

The British Olympic heptathlon champion ran a season's best in the heats earlier, coming third in 12:76.

Can she go better again? She's up against fellow Brit Tiffany Porter and the fastest woman this year in Kendra Harrison. 

A big American presence in this final.

It wouldn't be a class athletics meeting without a Kenyan one, two, three finish.

Silas Kiplagat comes out on top in the Emsley Carr Mile in 3:53.04, followed by Timothy Cheruiyot and Vincent Kibet.

Kiplagat, a former Commonwealth Games champion, is asked to sign his name in a posh looking book before accepting a rather snazzy glass dish trophy.