Dwain Chambers' legal team have launched a case against the British Olympic Association in order to reverse the sprinter's Olympic ban and allow him to run in Beijing. Chambers is currently banned from running at the Olympics after serving a two year ban for testing positive for designer steroid tetrahydrogestrinone (THG) in 2003. Under BOA rules, any convicted drug cheat cannot compete for the British team unless there are mitigating circumstances. The Guardian. IMO he should not be allowed to compete and my reason is that if he thought he could get away with using performance-enhancing drugs again he would use them, once a cheat always a cheat in my book.