Achievements Warburton finished fourth in the 800m at the 2010 Commonwealth Games. He was selected as part of the Welsh squad for the 2014 Commonwealth Games, however he was suspended shortly before the start of the Games after he was charged with a violation of anti-doping rules. In January 2015 United Kingdom Anti-Doping accepted that his positive test was due to taking a contaminated supplement and that he had not knowingly cheated, and gave him a six-month suspension, which was covered by the time he had been suspended since the Commonwealth Games.