1400: That's time for me to wrap things up. What a day. Bit of a rest tomorrow, with just the women's 20km walk to contend with. Stroll in the park? Nah. Middlesbrough-born Jo Jackson, who became the first British woman to win a major race walk title with gold at the 2010 Commonwealth Games, will be there. Stay with us on the BBC Sport website for reaction and analysis from today. We'll also have video highlights for you in about two hours. Cheerio for now folks.

Infostrada Sports on Twitter: "At 18yrs-363days Kirani James (GRN) is the 3rd youngest WCh gold medal winner ever in an individual event"

1356: Calling all those in the north-east of England. The Grenada team will train for the London Olympics in sunny Sunderland.

1354: That made the hairs on the back of the neck stand up.

1351: Incredible. Defending champion LaShawn Merritt led as they came out of the bend, but Grenada's James - who turns 19 this week and only became professional about a month ago - reeled him in with awesome poise. He just kept going, so gracefully. "He is so raw. A new star is born. What a way to run that race," says Allison Curbishley on BBC Radio 5 live sports extra. Clocked a new personal best of 44.60 seconds. Merritt's time was 44.63. Make sure you watch that on highlights if you haven't seen it already. Jeepers.

1345: Snake rattle. Men's 400m final. This could be special....

1344: So how do we think Great Britain are doing so far? Only one season's best time, no event personal bests. Steve Backley is forthright. "It's a shocker." Darren Campbell says: "Not enough of the British athletes have what it takes to keep fighting. A lot of it's about mentality. But it;s too early to cast full judgement" Allison Curbishley defends the sqaud though. "You don't get season-best times here. The races are tactical." Debate raging. Your thoughts?

1339: Groundhog day. Yet another Russian gold medal... Yuliya Zaripova wins the women's steeplechase. Habiba Ghribi, of Tunisia, was second while African champion Milcah Cheywa of Kenya took bronze. Ennis beams bashfully as she collects that silver.

Jessica Ennis's coach Toni Minichiello tells Mark Pougatch on 5 live sports extra: "I think she's got over it. Her run in the 800m proved that she has dusted herself down. It was really disappointing for that performance to occur in the javelin. It has to make us stronger. It's an opportunity to learn. She'll take a month off now. Possibly we'll look at doing the World Indoors, I'm not sure."

Anonymous on text: "Think a bit of reality is needed here! Even if Ennis had performed to her best - she still would have lost! Come 2012 she won't be the only one looking to improve! Tough times ahead I fear!"

World 800m champion David Rudisha on BBC Radio 5 live: "I've been dreaming of this since I started my career. I was really focused and I was patient for today."

Pole vaulter Yelena Isinbayeva: "I'm very sad and disappointed. I was just unlucky. But I'm really looking forward to the London Olympics now. That's more important for me."

1322: Fabiana Murer of Brazil has won the women's pole vault by clearing 4.85m not long after after two-time Olympic champion Yelena Isinbayeva was eliminated. Remarkable. World record holder Isinbayeva, failed to defend her title in Berlin two years ago after no-heighting in the final, could only finish down in sixth place. And here she is on BBC Radio 5 live...

1317: Britain's Hannah England, by the way, made it through - just - to the final of the women's 1500m a little earlier after a battling performance in her semi-final. Fine news for Team GB.

1306: Led from start to finish. Never looked in trouble. Pulled away in breathtaking fashion on home straight to win by the length of a London bus. Wow. "That's one of the best performances of these championships, easily," says Darren Campbell. "I'd love to see him do the 400m." But, also on BBC Radio 5 live sports extra (who have live commentary from Daegu), Allison Curbishley says: "Everyone wants him to move up to the 1500m!"

1301: Masai warrior Rudisha leads at bell. Perfect stride...

1300: Right. Here's the men's 800m final. This is a big deal. Kenya's David Rudisha the white-hot favourite. Joy to watch him in full flow. In terms of performance, he's the best athlete in the world right now.

Former heptathlete Kelly Sotherton on BBC Radio 5 live: "I'm sure the home crowd will be worth some extra centimetres at the London 2012 Olympics next year, and I'm sure Jess wil feel the benefit of that. It could be the difference between gold and silver."

Paul Brooks of Luton Athletics Club on Twitter: "Great competiton for Jess, Three PBs, Hurdle hit may have cost her and Javelin was poor. She will have crowd support next year"

Josh in Salisbury texts: "Ennis is an idol for any budding athlete out there. She may well have fallen short this time, but it will only make her want it more in 2012. Sarah is quite right, she reacts so well to disappointment."

1245: "Adversity is part of sport and at some point you are going to be asked that question," says Darren Campbell on BBC Radio 5 live sports extra. "It's how you deal with it. Jess has already rationalised what's happened and will move on." New world champion Tatyana Chernova says: "I can't imagine hwo much better I will get. I want to run faster, throw further."

Jess Ennis on 5 live: "Hopefully I'll bring the gold home next year!"

1240: With 6,751 points, Ennis actually scored 20 more than when she won the title in Berlin two years ago. But even her personal best of 6,823 would not have been enough... Chernova finished with 6,880. The Sheffield athlete also set personal bests in the 800m and shot put, and equalled her personal best in the long jump. So she performed well, save for that javelin disaster. Here she is again...

Heptathlon silver medallist Jessica Ennis: "I came here to win gold. It started off poorly and I got it together, but unfortunately the javelin was a big disaster. If I had to do it anywhere, it's here because it's next year where I want gold. I knew it would be very, very difficult. I was being realistic but I had to give it everything, and leave everything on the track. And that's what I did. We'll analyse it - we're not going to over-analyse it - the javelin let me down, it's an event I'm normally OK at. I'll go away and work really hard at it and come back stronger next year." Britain 11th in the medal table...

1234: That's three medals for Great Britain now. Silver for Ennis and Mo Farah, bronze for Andy Turner. Shiny gold still proving elusive.

Sarah texts on 81111: "Seeing the way Jess is reacting in the face of obvious disappointment makes me love her even more. What a champ!"

Clare Heffer on Twitter: "Next year Jess, next year..."

1224: So gutsy. But Russia's former world junior champion Chernova, who wins the gold medal, closed to finish within one second of Ennis - who finished second in that 800m heat. But Jess is smiling. "She did try and win the medal," shouts Darren Campbell on BBC Radio 5 live. "We know inside she's hurting but that may be the perfect catalyst for London 2012. That pain may just drive her on through a gruelling winter of training," adds Steve Backley.

1216: She's leading, pushing the pace, tall Chernova - the competition leader - in second with Jess pushing so hard now.

1215: Here's Jess. Pensive. Serious. Hopeful? Hopefully. They're off...

1213: Our chief sports writer Tom Fordyce is on BBC Radio 5 live sports extra explaining the relationship between Jess Ennis, while she is out on the track or in the field competing, and her coach Toni Minichiello, who is stranded behind the barriers. "He can communictae maybe one or two key instructions with gestures," says Tom. "That's all he can hope for. He must not convey any panic either." Coaches, by the way, aren't allowed to communicate with athletes through texts, tweets or calls to mobiles, and a gap of 10m separates the edge of the seating area from the advertising boards that mark the start of the track. Not long now...

1203: The final event of the heptathlon, the 800m, is under way. Britain's defending champion Jess Ennis is not in the first heat. Feeling tense? Imagine her thought process right now. Nine seconds.

Matthew Vernon on Twitter: "Re: songs to listen to in Ennis' hour of need. "I Believe in Miracles" perhaps?"

1154: No great shock. Great to have three Brits in the semis. Bershawn Jackson and L.J. van Zyl were your one-two there. Here's Dai Greene on BBC Radio 5 live sports extra as the British anthem serenades the stadium's ears with team-mate Andy Turner collecting that 110m hurdles bronze. "I switched off after about hurdle eight and cruised home, I was always in control. I know in the final I'll have the confidence, and I hope that sends a message to the other guys. Perhaps they'll realise I'm the man to beat in Thursday's final."

1146: Sharp intake of breath. Just 14 minutes until Ennis's D-Day...

1145: What a sight, the Welshman slowing down while looking left and right over his shoulders as he finishes way ahead of the rest of the field. The Welsh Bolt? Sort of. Silky smooth, apart from clipping one hurdle late on after a little stutter. BBC Radio 5 live's Allison Curbishley soothes any fears. "He won't make that mistake in the final. He's such a technician. He sighted it and thought he wouldn't quite make it and threw in a few extra strides. But he looked awesome, especially on that bottom bend. If it's not gold, there certainly going to be a British record."

1139: Right. Here's Britain's European champion Dai Greene...

1137: Leaner than a supermodel, Puerto Rico's Javier Culson romped home in first. Green clocked 49.62, so he could have ran quicker. Ah. Here's the teenager, who made up 10m on the home straight, himself on 5 live sports extra. "Give me a year and I'll be up there with those guys," he pants. "But I'm not happy with that at all. That was embarrassing. But I really want to run in the relay now."

Simon on Twitter: "Perri eased down at the end. Would have been at least 1 hundreth quicker had she not...."

Shakes-Drayton on BBC Radio 5 live sports extra: "I missed out big time. You can't muck about and I didn't. I put 110% into it. I knocked into a few hurdles, and that cost me time. It didn't happen in the heats. Many people want to be ninth-best in the world though. Many people would want to be in my position. I can dedicate more time to it [now I've finished university]. I'm looking forward to 2012."

1121: That really is an agonising blow for the ever-beaming Londoner, who finished third after clocking 55.07 seconds. So close... 55.05 would have seen her qualify ahead of the Ukranian athlete who denied her. But she is one to watch for the future, no doubt.

1115: Six gold medals to be decided this evening. I'll dissect potential highlights shortly. Loving the big snake-rattle that reverberates round the stadium before athletes get 'on their marks'...

Scotland's Eilidh Child tells BBC Radio 5 live sports extra: "I went out a lot harder than I have done before. But I went out a bit too hard. My legs were struggling a bit late on. I can learn from this though. It's a huge step up from the Commonwealth Games."

1108: Our chief sports writer Tom Fordyce leapt out of the press box to spend time with the pressure-filled Ennis camp yesterday, capturing the anguish and joy of her colourful coach Toni Minichiello. "One moment he's all animation, the next jamming headphones in his ears and falling silent. In the middle of a world final he is listening to Amy Macdonald," writes Tom. What tunes do you think he'll be listening to before her crucial 800m at 1200 BST? Let me know...

1101: Former British javelin thrower Steve Backley has been picking the bones out of Jessica Ennis's javelin performance this morning, which saw her fall from first to a distant(ish) second with one event to go. "It just went from bad to worse," he says. "It was horrible to watch from up here in the stands. She didn't show us what she is capable of." He also says the absence of her dedicated javelin coach hurt. "That may have been the downfall," he adds with reticence.

1055: Perfect timing. The evening session in steamy South Korea is about to get under way. And BBC Radio 5 live sports extra are off and running with live coverage...

1048: What else happened yesterday then? Some quick headlines for you. Adopting voice of true gravitas... BONG! Amantle Montsho won Botswana's first ever medal at the worlds with gold in the women's 400m final. BONG! South Africa's Oscar Pistorius, the first amputee athlete ever to compete in the competition, make history but still failed to reach the final of the 400m. BONG! And Carmelita Jeter, from the United States, raced to convincing victory in the women's 100m.

1041: "Most of the time, when those things happen, you accept them as part and parcel of 110m hurdling," mused BBC Sport's legendary former middle-distance runner Steve Cram last night as he reflected on day three's events. "But well done Andy Turner. Great performance."

1038: Because this world championships has been anything but Hollywood. No predictable storylines, staler than a baguette from Victorian times, here. You actually can't see what's coming next. Andy Turner's 110m hurdles bronze medal - Britain's second medal so far - following the dramatic disqualification of initial race winner Dayron Robles (for groping Liu Xiang rugby-style) was a glistening example of that. Not forgetting Usain Bolt bolting too early.

1034: It's also a phenonemal long shot, making up nine seconds in the concluding 800m event. More so when you consider that competition leader, Russia's Tatyana Chernova, has a personal best two seconds quicker than our Sheffield lass Jess. But we live in hope.

1030: Nine seconds. That's the magic number that'll be rattling around in the mind of Britain's Jessica Ennis right now, like those famous HOLLYWOOD letters which loom above Los Angeles, as she attempts to save her world heptathlon crown from the wreckage of an underwhelming javelin performance in South Korea this morning.