1978: Born Islington, London, April 5.
1994: English Schools intermediates champion at 100m.
1995: Gold in 100m and sprint relay at European Juniors.
1997: Gold in 100m and sprint relay at European Juniors. Won 100m in 10.06, a world junior record, the first by a British sprinter since Peter Radford in 1958.
1998: Took silver in Europeans and was third in World Cup.
1999: Second to Bruny Surin in Nuremberg in 9.99 seconds, thus becoming the second European sprinter to break the 10-second barrier after Linford Christie.
He then won for Britain at the European Cup and produced a series of fast times at 100m, including a brilliant win in 10.05 in cold weather at Gateshead, and then 9.97 to claim bronze at the World Championships.
2000: Won AAAs title in 10.11 and had a brilliant win over a top field including Maurice Greene at Gateshead. Improved his year's best to 10.08 in the Olympic final when he placed fourth.
2001: Won European Clubs Cup in 10.12 and the Goodwill Games (10.11 in a headwind). Other highlights included his 10.01 win at Seville, 10.00 for third in Lausanne and 10.01 to win the AAAs, the fastest-ever time with an allowable wind by a British athlete in Britain. At the World Championships, he broke 10 seconds for 100m twice, 9.97 (no wind reading) in the quarter-final and 9.99 for fifth in the final. He also made a breakthrough at 200m with third in the AAAs in a personal best time of 20.65 and a brilliant win at the Norwich Union British Grand Prix in 20.31.
2002: Ranked as world number two. After a brilliant 200m pb of 20.27 in Athens, in the cool of Manchester he ran brilliantly to win the Commonwealth Trials 100m in 10.03. Appointed team captain, he led by example at the European Cup by winning the 100m in 10.04 and pulling away from the field on the anchor leg of the 4x100m. He then had two terrific wins at 100m, beating Maurice Greene on both occasions, with 10.05 in Oslo and 9.95w in Sheffield, where he was also second at 200m in 20.38. His bid for 100m gold at the Commonwealth Games started well with wins in preliminary rounds in 10.19, 10.17 and 10.06, but he got off to a bad start in the final and pulled up with cramps, later attributed to lack of fluids.
Bounced back brilliantly to take the gold medal in a championship best of 9.96 at the Europeans and added a superb run to bring the British team to gold in the 4x100m relay in a world-leading time of 38.19.
Reduced his 100m best to 9.94 in his heat in Zurich before taking third in the final in 10.05 against the wind, and ran the first ever 'legal' sub-10 second time in Britain by a British athlete to win the 100m at the Norwich Union GP in 9.98 from Americans Tim Montgomery and Maurice Greene.
With a tailwind on the legal limit of 2.0 m/s, he tied Linford Christie's European record of 9.87 in second place to Montgomery's world record of 9.78 at the Grand Prix Final.
2003: Ran disappointing 6.68 for fourth in his 60m heat at the Norwich Union Grand Prix. Improved to 6.59 for second in the AAAs, but was beaten by 0.01 by Mark Lewis-Francis and thus missed a World Indoor Championships place.
Won AAA title in 10.08 and denied a super-fast time in bizarre circumstances at the British Grand Prix. Won race, delayed by 20 minutes when the timing system broke, and was given a hand-timed 10.0 subsequently shown as 9.96 on video analysis.
August 25 - Finishes fourth in the World Championships 100m final in Paris in a time of 10.08.
August 31 - Part of the 4x100m relay team which takes silver at the World Championships in a time of 38.08.
October 22 - Revealed to have tested positive for newly discovered 'designer steroid' tetrahydrogestrinone (THG). It came about after a sample Chambers had given out-of-competition in Germany in August was re-examined. Chambers denies knowingly taking the drug.
November 7 - IAAF suspended Chambers pending disciplinary hearing, after B sample tests positive.2004: February 12 - Chambers' coach Remi Korchemny was among four men indicted by a federal grand jury in America on charges of distributing illegal steroids.
February 19 - Chambers attends a disciplinary hearing with UK Athletics.
February 22 - Chambers is handed a two-year worldwide ban due to expire on November 7, 2005 and lifetime suspension from Olympic action. He has 60 days to appeal against the decision.
2005: November 7 - Ban expires but Chambers has to comply with World Anti-Doping Agency (WADA) regulations preventing him from returning to competition until he has undertaken three mandatory tests.
December 10 - Admitted using THG for 18 months before failing his drug test including when he became double European champion in August 2002.
2006: June 9 - IAAF accepted offer from Chambers to reimburse them with the appearance fees and prize money he won during the period he was using THG.
June 10 - Cleared by UK Athletics to make comeback.
June 11 - Returns to action at Gateshead, finishing third in 10.07 as Asafa Powell equalled his own world record of 9.77. His time is the fastest by a European in 2006.
June 21 - Selected to represent Great Britain in the SPAR European Cup in Malaga.
June 26 - All performances since January 1, 2002 annulled including individual and relay gold at the European Championships in Munich in 2002 and the European record of 9.87 he shared with Linford Christie after his admission to using THG prior to his failed drugs test.
August - Selected to represent Great Britain at the European Championships in Gothenburg.
Finishes seventh in the individual event before joining Mark Lewis-Francis, Darren Campbell and Marlon Devonish in the 4x100m sprint relay squad. The quartet won gold but their achievement was overshadowed by Campbell's refusal to celebrate on a lap of honour with his team-mates, saying it would be "hypocritical".
2007: March - Secured a contract with NFL Europa side Hamburg Sea Devils after completing a national training camp in Tampa, Florida.
2008: January - Chambers said to be looking at making a return to the track after NFL Europa folds.
UK Athletics chief executive officer Niels de Vos claims Chambers will be barred because he has not undergone drug testing since November 2006 when he left the sport and must wait a minimum of 12 months before returning. The IAAF claim he is eligible to run because he never retired from athletics.
February 2 - Qualifies for the World Indoor Trials in Sheffield by winning the 60m at the Birmingham Games in 6.60.
February 5 - Chambers allowed to compete in Sheffield after UKA grudgingly accept his entry after the athlete's solicitors prepared to launch a High Court injunction against them. Under IAAF rules, there were no grounds to prevent Chambers running.
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