He represented Britain a dozen times, winning gold medals at two multi-national tournaments before turning professional under revered fight guru Charles Atkinson.
On 5 May, in his third professional bout, he beat Jess Harper for the vacant BBBofC central area light-welterweight title.
On 1 June 1976, Singleton lost the title to Dave Boy Green after he was forced to retire from the bout, due to cuts over both eyes.
On 17 April 1980, he challenged Jørgen Hansen for the European welterweight title, losing by a unanimous decision.
[4] On 26 October 1980 he successfully defended his central area welterweight title by beating Lee Hartshorn on points.