Margret Adeoye was out of the top three after 150m, but the Briton pulls through to progress in 23.10. 

Unsurprisingly, former champion Veronica Campbell-Brown won the race but - incredibly - she finished the race in Adeoye's lane. 

The Jamaican, an experienced 33-year-old, a two-time champion, lost her bearings coming out of the bend and ended up in forbidden territory. Astonishing. Automatic disqualification for Campbell-Brown, surely. 

Margaret Adeoye, who is running in tights - the Beijing night perhaps a tad too chilly for her -  is the Briton contending the fifth 200m heat of the day. 

Running besides her will be former champion Veronica Campbell-Brown, who returns to action after missing the last World Championships following a failed drugs test. 

Image source, Getty Images

Michael Johnson
400m world record holder on BBC TV

Acres between Elaine Thompson and the rest, who is almost able to walk to the line and clock 22.78. Britain's Bianca Williams came second in a season's best 22.85. Canada's Khamica Bingham (22.90) is the third automatic qualifier. 

Britain's Bianca Williams, bronze medallist at the Commonwealth Games, sets off in the fourth 200m heat. 

She will be against Jamaica's Elaine Thompson (lane five) who is the fastest Jamaican over the distance after setting a personal best 22.10 in July. 

Image source, get

Cor blimey! Julius Yego has produced a phenomenal throw. The 5ft 9in Kenyan has thrown a world leading 92.72, which is a Commonwealth record - and the third longest in history. 

Kenya on course for a first non-track gold. 

Image source, AFP

Steve Cram
BBC athletics commentator

As we've already reported, Kenyan athletes Koki Manunga and Joyce Zakary have been given provisional bans after failing doping tests at the world championships.

Zakary, 29, ran a Kenyan record of 50.71 in the heat of the 400m in Beijing but failed to start the semi-final. Manunga, 21, finished sixth in her heat in the 400m hurdles last Sunday and failed to progress to the next round. 

Holly Bradshaw progressing nicely in the pole vault. The Briton has cleared 4.50m on her first attempt, as have seven other athletes. 

In the women's 200m, by the way, Marie-Josee Ta Lou (22.73), Jenna Prandini (22.95) and Justine Palframan (23.09) are through to the semi-finals. I know, big news. 

But Blessing Okagbare has withdrawn from the third 200m heat, although we do not know why. 

Germany's Thomas Rohler has set the standard in the men's javelin, throwing 86.68m on his first attempt. 

Kenya's Julius Yego fouled on his first attempt but recorded 82.42m with his second effort. 

Can he become the first Kenyan to win a field gold at a World Championships? 

Image source, BBC Sport

There must be something happening on the track, I hear you say. Well, yes there is. The women's 200m heats have just begun. 

Britons Dina Asher-Smith (heat seven), Bianca Williams (heat four) and Margaret Adeoye (heat five) will be trying to reach the semi-finals. 

Three from each heat progress and already through from the first heat are Candyce McGrone (22.45), Mujinga Kambundji (22.92) and Viktoriya Zyabkina (22.92).

Image source, Getty Images

Greg Rutherford, with a precious gold medal hanging around his neck, is at the Bird's Nest and is talking to Gabby Logan and co.

Image source, Getty Images

Michael Johnson
400m world record holder on BBC TV

From the dispiriting to the inspiring. Olympic 110m hurdles champion Merritt and world record holder has kidney function which is less than 20%. He will have surgery on 1 September with sister, LaToya Hubbard, donating one of her kidneys.

He qualified for the semi-finals earlier today.

Dark clouds hovering over today's athletics both literally and metaphorically because Kenyan athletes Koki Manunga and Joyce Zakary have been given provisional bans after testing positive for the use of banned substances at the World Championships. 

The 400 metres runners were targeted in pre-competition tests at their team hotel on 20 and 21 August, the sport's governing body, the IAAF, said in a statement.

Steve Backley
Four-time European javelin champion on BBC TV

For those of you wanting to know, Greece’sNikoleta KiriakopoulouandCuba’s Olympic silver medallistYarisley Silvahave been the form athletesof2015.

Remember Holly Bleasdale? The Briton now goes by the name of Holly Bradshaw, primarily because she met a man called Mr Bradshaw and married him. 

We've not seen her soaring ridiculous heights for about 16 months because of a back injury, and she's talked down her chances at these championships - but Bradshaw comfortably qualified for the final so perhaps there's a chance of a medal. 

The pole vault final has begun and Bradshaw has cleared her opening height of 4.35m. 

Image source, BBC Sport

It's the weather for ducks in the Chinese capital, not pole vaulters. Here's a picture of Australia's Alana Boyd sheltering from the rain before the women's pole vault final begins. 

Image source, Getty Images

Michael Johnson
400m world record holder on BBC TV

Image source, Getty Images