Education
Lyon was educated at West Leeds High School and University College, London.
Lyon was educated at West Leeds High School and University College, London.
He became a barrister, called to the Bar at Inner Temple in 1954. He was also a Methodist local preacher and secretary of Leeds North West Constituency Labour Party. He was Minister of State at the Home Office, March 1974 - April 1976, but, as a radical, was sacked by Jim Callaghan.
In 1981 he tried to amend a Finance Bill to allow those with a "conscientious objection to paying for expenditure on defence" to pay the military part of their taxes to the then Ministry of Overseas Development.
He was defeated in the 1983 General Election by the Conservative Conal Gregory.
44th United Kingdom Parliament. 45th United Kingdom Parliament. 46th United Kingdom Parliament.
47th United Kingdom Parliament.
48th United Kingdom Parliament]
He was a member of the Bar Council and of the Fabian Society. Lyon was elected Member of Parliament for the marginal City of York in 1966, having first fought the seat in 1964.