Dwain Chambers has taken the first step in his bid to challenge the Olympic ban imposed upon him by the British Olympic Association.

"We can confirm that Dwain Chambers will be taking proceedings to secure his eligibility/participation in the Olympic and National trials in Birmingham from 11-13 July," said Nick Collins, the athlete's lawyer, in a statement on Friday.

That clearly indicates that if Chambers should win the 100 metres title there, he will take legal action against the BOA for the right to compete at the Beijing Games in August

A BOA by-law automatically imposes lifetimes bans upon athletes who commit anti-doping offences, and that applies to Chambers who tested positive for tetrahydrogestrinome (THG) in August 2003.