I think i read somewhere that he competed in musclemania a natural UK bodybuilding show.
From their site:
Because the Musclemania World Championships and Figure Universe are natural bodybuilding and ladies figure events, at the discretion of each regional event promoter, the Top 5 Finalists in each Division or Weight Class may be subject to a drug test by urinalysis and/or polygraph methods immediately following their performance at the Finals. At the America, World and Universe Championships, all competitors will be asked to provide a urine sample and be subjected to thorough urinalysis testing. Attached is a complete list of substances which will be included. If a contestant is tested positive for any of the listed substances, the he/she will be disqualified from the competition, forfeit any prizes and/or rewards and be unable to compete in any Musclemania or Figure Universe event worldwide for at least 2 years. Also, if a contestant refuses to submit to drug testing or attempts to manipulate and/or alter the a urinalysis sample, then he/she will be immediately disqualified from the competition.
Follow the link for the drugs they test for.