The 29-year-old, who has begun a month-long trial with rugby league side Castleford Tigers, returned from a two-year suspension from athletics for taking a banned substance in 2005.

Chambers was recently criticised by UK Sport's director of drug-free sport, John Scott, for not doing enough to help the anti-doping cause.

But Chambers's lawyer Nick Collins has since called Scott to arrange talks, which are set to take place later this month.

Scott claimed last month
UK Athletics had sounded out Chambers over the possibility of talks but had received no response.

He insisted the sprinter, who won 60m silver at the World Indoor Championship after UKA reluctantly selected him for the Great Britain team, could provide information that could help catch suspected drugs cheats.

Scott urged Chambers to follow the example of Scottish cyclist David Millar, who rehabilitated his reputation after a drugs ban by committing himself to the anti-doping effort.

Collins this week denied any contact had been made with Chambers and insisted his client would be happy to help.

Chambers is believed to be preparing a legal challenge to his lifetime Olympic ban. A willingness to supply information may boost his chances of competing in Beijing, which remains his major goal despite his high-profile Super League switch.

Precisely what Chambers will be required to divulge is unclear, but it is expected to include full disclosure of substances he took prior to being caught out by a test in 2003.

Chambers has been registered as a trialist with Castleford this week, but the Tigers yesterday emphasised he will not be considered for this Sunday's game with St Helens.

He will continue to train with the club with a view to a possible appearance in the reserves, who also play on Sunday.