However BOA is not happy that Dwain Chambers will participate in 2012 Olympics, they support him

The sprinter Dwain Chambers, who successfully served his 2-year ban for administration of anabolic steroids, was named the representative of Great Britain in the 2012 Olympics.
Chambers troubles about the way to represent the native country. As for the British Olympic Association (BOA), they don’t desire to see him taking part in the 2012 Summer Olympics. Several former British Olympians don’t support the steroid user too.
The sprinter used the steroid tetrahydrogestrinone (THG) introduced by Patrick Arnold. After Don Catlin elaborated a method which could disclose intake of THG, the sprinter tested positive for this steroid. It was on November 7, 2003.
Undoubtedly, administration of the steroid destroyed his reputation. When he tried to return to professional sports, the BOA made the decision to alter the laws in order to prevent appearing of Dwain Chambers in the 2012 London Olympics. The BOA has established the rules which suspend steroid users from Olympics for life-time.
Introducing this rule, the BOA violated the doping code of the World Anti-Doping Agency (WADA). This factor caused numerous disputes and news.
The case was even examined in the Court of Arbitration for Sports. The chairman of the BOA Loyd Moynihan put significant efforts in order to prevent appearing of Dwain Chambers or other steroid users at Olympics. Such former Olympians, as Sebastian Coe and Daley Thompson, loudly supported efforts of the BOA.
 Daley Thompson confirmed that Britain should not compromise. He confirmed that Britain should not listen to the rest of the world that don’t want to have high standards in sports. The Court of Arbitration for Sports acted on behalf of the WADA. Chambers was allowed to represent Britain at the 2012 Summer Olympics. This case turned out to be an open door for other athletes that have served their bans to participate in Olympics.
The cyclist David Millar and the shot-putter Carl Myerscough that have served their bans for intake of steroids will compete at the 2012 Olympics too.
Despites wasting much time to keep former steroid users from Olympic Games, the BOA ultimately confirmed that not only Chambers but also Millar, Myerscough or any other sportsperson that has served a ban successfully may compete at Olympics. The CEO of the BOA Andy Hunt has confirmed that any sportsperson is treated the same way.