SPRINTERS Craig Pickering and Tyrone Edgar were named in Britain's finalised Olympic squad for Beijing on Saturday following Dwain Chambers's failure to win his court battle.
Both runners had been waiting anxiously since last Saturday's race when Chambers won in the fastest time by a European athlete this year of 10.00 seconds, with Williamson in his slipstream.
Williamson, the European Under-23 champion, was the only athlete announced in the first wave of selections last Monday, with the selectors deferring naming the other two until Chambers's High Court appearance.
However, the 30-year-old drugs cheat lost his injunction, opening the door as expected for Pickering and Edgar to be chosen.
"This has been one of the strangest weeks of my life and I don't ever want another one like it," said Edgar, who won last month's European Cup 100m in Annecy.
"I would have preferred a smoother ride, but it has been like a roller-coaster. But athletics is like that. You get the ups and downs."
The US-based star admitted: "I was really disappointed at the trials, but I remained hopeful throughout the week I would get selected for the individual 100m.
"Now, I have a big smile on my face. The Olympics is the biggest sporting event in the world and I'm really excited to be part of it."
Edgar, like many other of his team-mates, has been annoyed that Chambers's bid to run in Beijing has detracted from the performances of the 68-strong squad of whom 21 will be debutants.
"I'm just thankful the court case is over and grateful for the opportunity," he said.
"I've been getting a bit irritated with all the questions about it, but now I just want to forget about it and look forward to Beijing.
"I just want to take it round by round now and do the best I can."
The full Great Britain athletics squad for Beijing has now been named.
Notable additions include the world junior 1500m gold medallist Stephanie Twell, who has earned her place on merit rather than by inclusion under the criteria of being a potential medallist or podium finisher at the London 2012 Games.
The 18-year-old from Aldershot, who held the qualifier from last year, clinched her slot when running a lifetime best of four minutes 5.83 seconds in Friday night's Paris AF Golden League meeting.
Andrew Lemoncello, who achieved a 3000m personal best at the Stade de France, has also been selected with fellow Scotsman Allan Scott chosen for the 110m hurdles.
Martyn Bernard is added to the high jump squad, while Rikki Fifton - always on the borderline for a 200m place - has been added to the 4x100m relay squad with Channel Islander Dale Garland joining the 4x400m quartet.
Montell Douglas, who smashed Kathy Cook's 27-year-old British 100m record with a time of 11.05sec at Loughborough on Thursday, has been picked for that distance along with Laura Turner.
MEN:
100m: Simeon Williamson, Craig Pickering, Tyrone Edgar
200m: Marlon Devonish, Christian Malcolm, Alex Nelson
400m: Martyn Rooney, Andrew Steele.
800m: Michael Rimmer.
1500m: Andy Baddeley, Tom Lancashire
5000m: Mo Farah
Marathon: Dan Robinson
3000m steeplechase: Andrew Lemoncello
110m hurdles: Allan Scott, Andy Turner
High jump: Martyn Bernard, Germaine Mason, Tom Parsons
Pole vault: Steve Lewis
Long jump: Greg Rutherford, Chris Tomlinson
Triple jump: Phillips Idowu, Larry Achike, Nathan Douglas
Decathlon: Daniel Awde
4x100m: Harry Aikines-Aryeetey, Tyrone Edgar, Rikki Fifton, Craig Pickering, Simeon Williamson
4x400m: Michael Bingham, Richard Buck, Dale Garland, Martyn Rooney, Andrew Steele, Rob Tobin
WOMEN:
100m: Montell Douglas, Jeanette Kwakye
200m: Emily Freeman
400m: Lee McConnell, Christine Ohuruogu, Nicola Sanders
800m: Jenny Meadows, Marilyn Okoro, Jemma Simpson
1500m: Lisa Dobriskey, Susan Scott, Stephanie Twell
5000m: Jo Pavey
10000m: Jo Pavey, Kate Reed
3000m steeplechase: Helen Clitheroe, Barbara Parker
Marathon: Paula Radcliffe, Mara Yamauchi, Liz Yelling
100m hurdles: Sarah Claxton
400m hurdles: Tasha Danvers
Pole vault: Kate Dennison
Long jump: Jade Johnson
Discus: Philippa Roles
Hammer: Zoe Derham
Javelin: Goldie Sayers
Heptathlon: Kelly Sotherton
20k walk: Johanna Jackson
4x100m: Emma Ania, Montell Douglas, Jeanette Kwayke, Ashlee Nelson, Anyika Onuora, Laura Turner
4x400m: Vicki Barr, Donna Fraser, Lee McConnell, Christine Ohuruogu, N Sanders