Simeon Williamson beat Dwain Chambers to seal his place on the British team for the World Championships in Berlin.

Williamson stormed to victory in 10.05 seconds at the trials in Birmingham, despite running into a strong headwind of 1.8m per second, with Chambers second ahead of Tyrone Edgar.

"You can't win them all and the best man won on the day," said Chambers, who appeared unaware that only the winner is guaranteed a place in Berlin.

"This was always going to be the hard part, the trials. Hopefully we have both secured our place and now we can start having some fun and dropping some times."

Williamson added: "It's great just to win a national title, my first after being the bridesmaid so many times. I'm happy with the run.

"I was hoping to go sub-10 seconds but now we can go back on the circuit with the big boys. We need to start running sub-10, it's standard now. You have to run sub-10 to make finals."

Williamson's time was the fastest by a European sprinter this year, although the size of his task in Berlin was emphasised by American Tyson Gay - the reigning world champion - running 9.77 in Rome on Friday night in a race where the top four all broke 10 seconds.

Chambers, who won the European Indoor title and the 100 and 200m at the European Team Championships this season, admitted the defeat might be just what he needed.

"I think I need a kick up the backside. I've not had to really fight for anything this season but now I do," said the 31-year-old.

"He has always wanted to beat me, he ain't doing it again! I ain't done yet but I have some work to do and I will bounce back."

After finishing second Chambers is not guaranteed a place in Berlin, but it seems inconceivable he will not be selected after being picked for those European Team Championships in Portugal last month.

"It might be different with me but I finished in the top two," he acknowledged with a smile.

Olympic and world champion Christine Ohuruogu won the 400m in a time of 51.26, but admitted she would have liked a faster run after main rival Sanya Richards won in Rome in 49.46.

"I didn't watch it (Sanya's run) but I'd be lying if I said I didn't take notice," Ohuruogu said.

"But you can't affect what other people do.

"All I can do is make sure I'm in the best shape when the World Championships come. I hope there's a faster time there but I'm working hard so there's nothing to stop me running faster than today.

"Today was not bad but it's not great. It's not what I would have liked to run but a win is a win."

Kate Dennison claimed a bonus of US$5,000 (£3,084) for breaking her own British record in the pole vault for the third time (outdoors) this summer, the 25-year-old clearing 4.57m to improve the record by one centimetre.

Olympic silver medallist Germaine Mason won the high jump with a mediocre clearance of 2.24m, well short of the current 'A' standard of 2.31m required to guarantee selection.

However, Mason does have the 'A' standard from last year and that should still see him selected for the team later this month.

"I'm happy to have won but I would have liked to jump higher," said Mason.

"I still need to work on my technique and I have a few more competitions before the worlds to get it right."

Kelly Sotherton could only manage eighth in the shot put on her return from injury, but her best of 14.51m was only 15cm short of her personal best.

Andy Turner won his fourth consecutive 110m hurdles title to book his place on the plane to Berlin, the 28-year-old continuing to prove his doubters wrong after being stripped of lottery funding last year.

"I'm happy with it, 13.47 into a pretty substantial wind shows I'm in good shape," said Turner.

"If it had been the other way round, who knows? It might have been a personal best."

And another athlete without financial support was a surprise winner of the women's 1500m, Wakefield's Charlene Thomas winning ahead of world junior champion Stephanie Twell and Hannah England.

"I wanted it so badly, my first British vest," said the 27-year-old.

"I'd like to thank everyone at Leeds Metropolitan University for all their help because I'm not on any funding and I couldn't do it without them.

"I thought I had let Steph go too much but I maintained that belief that I could outsprint them. I had the belief, I just had to stay patient."