Statement from Graham Shear, the solicitor of Dwain Chambers, in response to the decision by a UK Athletics disciplinary hearing to hand his client a two-year ban:
"Dwain has always and continues to assert that he has never knowingly taken performance-enhancing substances.
"The strict liability nature of the IAAF rules has meant that this was not a factor the tribunal was allowed to take into account in deciding whether or not a doping offence had been committed.
"Dwain was charged with taking a substance which was not listed as a banned substance but which fell within the 'catch-all' provision of the IAAF rules as being either chemically or pharmacologically related to a banned substance.
"Dwain's challenge to the UK Athletics and IAAF allegations regarding THG focused on the fact that although there was scientific evidence to show that THG was chemically related to banned substances, this, in itself, could not be sufficient to constitute a doping offence.
"It was asserted that it would be unjust for an athlete to be banned where there was insufficient evidence to show that THG had any performance-enhancing effect on the human body.
"Dwain's challenge has been unsuccessful. The tribunal has held that evidence of a chemical relationship between a listed substance and a non-listed substance alone is sufficient to constitute a doping offence.
"However, the tribunal also noted that there was no clinical evidence of an anabolic or performance-enhancing effect of THG in the human body.
"Further, the tribunal noted that no evidence was produced, nor was it even suggested by UKA, that Dwain was knowingly or intentionally involved with THG.
"Dwain has been given the minimal ban available in the circumstances, and he continues to assert his innocence.
"The decision of the tribunal is being studied in detail for the purpose of considering a possible apeal to the Court of Arbitration for Sport."