Craig Nelson
BBC Sport reporter

That's it from us.

Audrey Werro's appeal proved successful, with footage showing France's Anais Bourgoin had unintentionally hit Werro's right foot with her left hand.

An earlier angle seemed to show Werro had clipped her own leg before falling.

Read the full race report here.

Join us again from 19:00 BST for today's evening session, when GB sprinter Amy Hunt will bid to add to her medal tally.

Steve Cram
BBC athletics commentator at Alexander Stadium

She [Audrey Werro] tripped herself, I think that is reasonably evident but look, we all want to see the best athletes in the final.

Even Keely [Hodgkinson] said that.

The referees have a had a look at it...I don't think Great Britain will counter protest this because Keely wants her to be there.

The question is whether Werro is ok, it was a really hard fall.

But we are getting the final we wanted, that's one way to look at it.

There were no such concerns for British hope Keely Hodgkinson.

The defending champion controlled the pace in the second semi-final, coasting home at the front in a much quicker time than the first semi-final...

Steve Cram
BBC athletics commentator at Alexander Stadium

[Audrey] Werro has now been advanced to the final. One of the favourites. Despite looking as though she tripped herself, she definitely took Gabija Galvydyte down, she was advanced about 15 minutes ago.

And now Werro has been advanced by the referee into the final. There will be 10 athletes to contest the final. And remember Keely's last comment was I hope it's clean, well that's going to be difficult with 10 athletes contesting the final.

It didn't look good for Audrey Werro, with former Olympic long jump winner Greg Rutherford saying that replays seemed to show that the Swiss athlete tripped over her own feet and was not brought down by a competitor.

However, officials have since put Werro through to Friday's final, as confirmed by Steve Cram in BBC One's coverage earlier today...

Here are the highlights of that dramatic first semi-final...

If you are just joining us, Swiss athlete Audrey Werro, who was expected to be defending champion Keely Hodgkinson's main rival for gold, fell in the first semi-final of the women's 800m and finished last.

But Werro told BBC Sport that she intended to appeal and officials have since confirmed that she has been given a place in Friday's final.

Image source, Getty Images

Image source, Getty Images

Image source, Getty Images

Image source, Getty Images

Steve Cram
BBC athletics commentator at Alexander Stadium

I remember Keely's last comments, saying I hope it's clean. That is going to be slightly more difficult with 10 athletes contesting the final.

Paula Radcliffe
Former women's marathon world record holder on BBC One

Paula Radcliffe spoke to BBC Sport about the feeling of falling and then having to finish: "Thankfully I've not had to experience that, moving at that pace and then falling that hard. I mean every distance athletes knows if that happens and you go down, you have to get up and finish that is the only criteria that you're going to make it through. If you don't do that, you have no chance of being advanced through to that final. You could see she was not comfortable."

On was she impressed with Keely Hodkingson: "I was very impressed with Keely and Femke Broaders-Bol. She looked as though she had another gear there but didn't use it, she didn't need to expend anymore energy. And we've talking a lot about the big question being we know Keely has the endurance, but does Femke have that endurance to bounce back for three rounds? But she is used to back to back rounds in multiple events."

It has been confirmed that Switzerland's Audrey Werro will be one of 10 athletes to compete in the women's 800m final.

Werro and Lithuanian athlete Gabija Galvydyte, who was brought down by Werro as she fell, have both been added to the start list for Friday evening's final.

They join automatic qualifiers Keely Hodgkinson, Femke Broeders-Bol, Eloisa Coiro, Jemma Reeke, Anais Bourgoin and Veronica Vancardo.

The two fastest women outside the top three to qualify on time both came from the second semi-final, with Switzerland's Valentina Rosamilia and France's Clara Liberman, who finished fourth and fifth, completing the start list for the final.

GB's Jemma Reekie on blocking out Audrey Werro's fall to qualify in first place from the first women's 800m semi-final:

"It wasn't the race I planned, at all, but I kept my calm, I kept my cool, I didn't panic and really pushed out that last 100m, which I am really proud of."

On running a season's best to reach the final: "I have been working on a few things and I think with each championships are helping me learn so much about myself, bringing something new into every round. So yes, I am really happy with that run."

Image source, Getty Images

Image source, Getty Images

Audrey Werro has twice gone under one minute 54 seconds this year, but still more than half a second from Jarmila Kratochvilova's record.

Olympic champion Keely Hodgkinson broke the 800m indoor record in February, which had stood since 2002, crossing the line in 1:54.87.

Then there's the Netherlands' Femke Broeders-Bol, still largely an unknown in the 800m after deciding to switch disciplines from 400m hurdles. But, with little 800m experience, she ran a time of 1:55.60 seconds at the Paris Diamond League event in June.

"They're all dragging each other to these incredible times. The level of the 800m has risen significantly in the past two years," said Jessica Ennis-Hill, who won heptathlon gold at the London 2012 Olympics.

Emma Middleton
BBC Sport reporter

Audrey Werro and Keely Hodgkinson had been tipped to produce an explosive women's 800m final, with both athletes edging closer to breaking the world record at the distance over the past year.

The women's 800m world record is held by Czech athlete Jarmila Kratochvilova, who ran a time of one minute 53.28 seconds in 1983.

There have been claims that Kratochvilova's performance in Munich was assisted by the systematic doping regime that existed in her country at the time - something she has strenuously denied.

Back in 1983, then 32-year-old Kratochvilova crossed the finish line more than seven seconds ahead of her closest rival, Poland's Jolanta Januchta.

No-one would come within a second of Kratochvilova's record for 25 years.

The closest any athlete has come to breaking it is Swiss athlete Werro, who ran a time of 1:53.80 in June this year.

Audrey Werro got up off the track, despite falling heavily in that first semi-final, and while she seemed to be winded had the presence of mind to get up and finish the race.

The officials must now assess the footage to see whether she was hindered by a competitor.

The Swiss athlete could be given a place in the final if that is the case.

London 2012 long jump champion Greg Rutherford, who is one of the BBC experts at Alexander Stadium, has said that BBC One footage from a different angle seems to show that Audrey Werro got her own legs tangled and did not get clipped by a competitor, meaning she is unlikely to be given a place in the final on appeal.

Here are the qualifying times for the second semi-final:

1. Keely Hodgkinson (q) - 1:57.38
2. Femke Broeders-Bol (q) - 1:57.46
3. Eloisa Coiro (q) - 1:57.74

Keely Hodkingson talking to BBC Sport on whether she saw Aubrey Werro fall: "I heard the 'oooh' which is never a good sign, I don't know what it looked like. You can't worry about what happened to other people, I hope she's okay and in the final tomorrow for an exciting race."

On whether she was happy with the result: "Another 1:57 so I'm happy. The excitement makes me excited. I love a good challenge and I hope for a clean race with no falling over and no wind please, I'm going to talk to an Esty witch to make sure there's no wind."

Here are the times from the first semi-final:

1. Jemma Reekie (q) - 1:58.61
2. Anais Bourgoin (q) - 1:58.84
3. Veronica Vancardo (q) - 1:59.14

Femke Broeders-Bol said she hoped Audrey Werro was ok as she went through the mixed zone.

Keely Hodgkinson was next to talk to BBC Sport. The defending champion said she heard an "ooohhhh" from the crowd but said that she could not worry about the other race before her semi-final.

She added that she hoped Werro was ok and would qualify for the final.