At the national level, Turner won the 200 m Welsh title on three occasions, having back-to-back wins in 1995 and 1996 before taking his final title in 2001. His winning time of 20.54 seconds in 2001 was a record for the meet. He was also twice a 200 m winner at the AAA Indoor Championships, topping the podium in 1996 and 2002. He achieved his personal best of 20.43 seconds in 1996. He managed fifth for Great Britain at the 1998 IAAF World Cup, recording a time of 20.51 seconds, but failed to get past the semi-finals at the 1998 Commonwealth Games. At that competition he was part of the 4 × 100 metres relay team and placed fourth in a team of Malcolm, James Henthorn, and Kevin Williams.