GB Olympic Athletics Trials - as it happened

Join me tomorrow for more live text commentary from 1600 BST. Live coverage begins on BBC Two and the BBC Sport website from 1700.

That's all folks. As heptathlete Jessica Ennis becomes double British champion in the high jump and 100m hurdles, so too does Eden Francis in the shot put and discus. Pole vaulter Steve Lewis, long jumper Greg Rutherford, hurdler Tiffany Porter, reigning Olympic 400m champion Christine Ohuruogu and sprinter Adam Gemili are just some of the athletes we can expect to see when the Olympic athletics competition kicks off in August.

So the race is on for Chambers, who has until July 1 to get that magic Olympic 'A' standard of 10.18s.

Dwain Chambers was visibly relieved to win a competitive 100m final: "First of all, I want to apologise for swearing at the end of the race," he said on BBC Two. "I got a little carried away.

"I was so scared because my heat in the semi-final didn't go well. I had pressure with all the youngsters like Adam coming through, but I relied on my experience and it got my through. I knew Adam was going to be quick and I wanted to get a start and stay ahead.

"I still need to get the qualifying time and I have a chance to get it at the Europeans in Helsinki next week, so that is the next step. The pressure of trials is the hardest part and I am glad it's over. Now I can concentrate on getting the time."

18-year-old Adam Gemili looked as happy as anybody with his second-place finish in the 100m - and he was excited about the possibility of competing at the Games. "I can't believe it, I don't know what to say," he said on BBC Two. "Now I have run the standard and finish in the top two, I will speak to my coach about what to do next."

A few results from earlier in the day. Lee Doran took the men's javelin title with 79.72m. 50-year-old Roald Bradstock, wearing the outrageous tracksuit he wore as part of Britain's 1984 Olympic squad, came second with a season's best of 72.78m - not enough to make it to London.

Jessica Ennis underlined her stunning form with an impressive victory in the 100m hurdles, and she told BBC Two: "It's great to come here and do well - it's a big weekend for British athletes. The crowd have been brilliant, it's a packed stadium and they have really got behind us. It was nice to know I had the qualification, so I could come here and sharpen up on the individual events.

Hurdler Tiffany Porter will be disappointed in losing to a multi-eventer but when that multi-eventer is the irrepressible Jessica Ennis, surely she can be forgiven? Ennis's time of 12.92 was inside the Olympic 'A' standard proving just how strong her hurdling is.

One to watch coming up as Jessica Ennis goes up against Tiffany Porter in the women's 100m hurdles final now. Live on BBC Two and at the top of this page, don't forget. Who's your money on? Let me know via Twitter using #bbcathletics or text 81111 (please leave your name). Here we go.

Christine Ohuruogo says she was using the Team GB trials as preparation for the Olympics, with the races so close together. "This championship is about putting together the Olympic programme," she told BBC Two. "I am not delighted with the time but it was okay. I have had a hard week, I have been training hard so I was ready to deal with the Olympic programme. I am going to rest for a couple of days now and then get ready for London 2012."

Ohuruogu, reigning Olympic 400m champion, will defend her title in London as she books her place in the British team. Not the best time (51.89s), but Ohuruogu finished strongly way ahead of the field.

Dai Greene and Jack Green both train together at Bath, and the two 400m hurdlers told BBC Two they expect to improve their times even further heading into the Olympics. "It is a nice feeling to qualify," said Green. "It is what I came here today for. I wanted to run quicker but getting to the Olympics is the main thing." Meanwhile, Greene added: "It is great that the UK has so many good hurdlers and people like Jack keep pushing me in training. I feel like I am getting back to where I want to be and I will hopefully have a couple more races before the Olympics."

Hammer thrower Sophie Hitchon was understandably delighted with her selection for London 2012. "It is great," she said on BBC Two. "If somebody had told me that when I was 20 I would be selected for the Olympic team, I would be happy with that. We have got the Europeans next week, so that is the focus next, but then it is the Olympics. Hopefully it all goes smoothly."

Did you enjoy those 100m semi-final heats? The man everyone is talking about, Adam Gemili, goes through to the final as fastest qualifier. That will set him against British athletics most other talked about man, Dwain Chambers. Throw in 'A' standard holder James Dasaolu, Mark Lewis-Francis and Simeon Williamson and we're set for an exciting final at 18:17.

Dwain Chambers up next. He is reigning British 100m champion but what has he got today? I hope you're watching live on BBC Two.

Controversial sprinter Dwain Chambers comfortably won his 100m heat yesterday, whilst man-of-the-moment 18-year-old Adam Gemili also made it through to today's semi-final. Both are coming up live in the coming minutes in the semi-final heats. Final at 18:17, that'll be one to watch.

We've had a few results in already. British heptathlete record holder Jessica Ennis set a season's best in the high jump to win with 1.89m, before failing three attempts at 1.92m. Ennis was the stand-out performer in what is a weak event for Britain, with noone having managed to jump the 'A' or 'B' qualification standard.

It will be make or break for many of the athletes competing this weekend. If we look at it in simple terms, an athlete needs to have attain the UK Athletics 'A' qualification time or mark in addition to a top two finish at the Trials. But realistically, with so many competitors raising their games and achieving those 'A' standards, working out the winners and losers in some events will be far more complicated. Allow chief sports writer Tom Fordyce to explain.

But you still have a reigning Olympic and reigning world champ, as I mentioned earlier, to look forward to. Last year's World 400m hurdles champion Dai Greene will look to book his place in London at 17:13 BST, whilst 2008 Olympic 400m gold medallist Christine Ohuruogu contests her final at 17:43. Then, British athletics' golden girl Jessica Ennis lines up for the 100m hurdles at 17:54.

Then 5,000m world champion Mo Farah pulled out of the 1500m final. "I need to rest as much as possible and save my legs to defend my European title next week..!!" he explained on his Twitter. Disappointing for those that have grown to love his 'Mo-bot' dance at the end of every race.

Phillips Idowu announced yesterday he wouldn't be competing in today's triple jump competition due to injury. But hopefully the likes of hip-hop stars Jay-Z and Nicki Minaj can put a smile back on the Londoner's face at the BBC Radio 1 Hackney Weekend Festival, which Idowu seems to have tickets for today.

What a day of athletics we have coming up. It's day two of the British Olympic Trials where Birmingham's Alexander Stadium will play host to a reigning Olympic champion, a reigning world champion and countless London 2012 medal contenders. Quite a lot has happened already, so let me update you.