Dunnett was educated at Whitgift Middle School, Croydon, and Downing College, Cambridge, and became a solicitor. He served as a councillor on Middlesex County Council 1958-61 and on Enfield Borough Council 1958-61, serving as an alderman until 1963. He was elected to the Greater London Council in 1964.
Dunnett was elected at the 1964 general election as Member of Parliament for Nottingham Central and held the seat until it was abolished in boundary changes for the 1974 election. He was then returned for the new Nottingham East constituency until he retired from the House of Commons at the 1983 general election, when Nottingham East was won by the Conservatives.
Dunnett was Chairman of Brentford Football Club. In January 1967 he agreed a sale of the club with Jim Gregory of Queens Park Rangers in a move which threatened Brentford’s future. A consortium of businessmen and supporters of Brentford bought out Dunnett’s shares to stave off this takeover.
- "A brief history of Brentford Football Club". Brentford FC. Retrieved 1 March 2017.
- "The Brentford Take-Over Saga". Vital QPR. Retrieved 1 March 2017.
- "Start of Notts County lifeline 1986 with Jack Dunnett interview". Retrieved 1 March 2017.
- "County leave world of deals and leases to breathe again". The Independent. Retrieved 1 March 2017.
- "The Football Association Executive Committee" (PDF). Hillsborough Enquiry. Retrieved 1 March 2017.
- Times Guide to the House of Commons, 1966, 1979 and 1983 editions
- Leigh Rayment's Historical List of MPs [self-published source][better source needed]
- Who's Who 2013, pg. 663: DUNNETT, John Jacob, (Jack)
- Hansard 1803–2005: contributions in Parliament by Jack Dunnett
|Parliament of the United Kingdom|
|Member of Parliament for Nottingham Central
1964 – Feb. 1974
|New constituency||Member of Parliament for Nottingham East
Feb. 1974 – 1983
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