William Lambton appeared as a guest for Exeter City during 1945/46 when two interim league competitions - Division Three South (South of Thames) [played until Christmas] and the Division Three South Cup (Southern Section) [played from January] - were organised ahead of a return to ‘normal’ league football in 1946/47. He later managed a number of clubs including Leeds United.After playing for junior side, Basford North End, Lambton signed professional forms for Nottingham Forest in May 1935 but he never played a league match for them. In 1939 was employed as a fitters' labourer in Nottingham. He was a guest player for Exeter City in April 1946 appearing in three matches in the Division Three South Cup (Southern Section). He also played in goal in the Devon Championship against Torquay in May 1946.
After declining a contract with the Grecians, he signed for Doncaster Rovers in October 1946 and featured in three league games for them. In 1951 he became a coach in Denmark with KB Copenhagen who he managed for 4 years, he then went on to manage at Scunthorpe United, Grimsby Town and Leeds United. He was appointed manager of Leeds United in December 1958 and, although he was only in post for a few months, signed Don Revie and a 15 year old Billy Bremner. Returning to Scunthorpe United as manager in April 1959, he left after only three days before serving as Chester's manager between 1962 and 1963.
A former Sergeant Major in the Army he was known as ’Iron Man Bill’ and died in 1976 at Sherwood, Nottingham.