Stephen has competed in four paralympics, his first and most successful was in 1996 where he had a clean sweep of the T37 sprint events, winning gold in 100m,200m and 400m as well as winning a silver in the T34-37 4 × 100 m as part of the British team. Four years later in Sydney he was not as successful winning bronze medals in both the T38 100m and 200m and a silver in the 400m and being part of the British team that improved to silver in the T38 relay. By the Athens games Stephen was not part of the relay team but did still compete in the three individual sprint races but only managed a bronze in the 400m. In the 2008 Summer Paralympics he competed in the 200m and 400m but for the first time in four games did not win a single medal. He also competed at four IPC world championships in Berlin 1994 Birmingham UK 1998 Lillie 2002 and Assen 2006 . Winning 7 gold 2 silver and 1 bronze medals. He has held the European T38 400m record since 1994 .