Early life
Hennessy, an Anglo-Irish British peerage, peer, was educated at Ampleforth College and Trinity College, Oxford, earning a Master of Arts (Oxbridge and Dublin), Master of Arts in Jurisprudence in 1957. He did his National Service with the Grenadier Guards in Tripoli, Libya, Tripoli. His father, James Hennessy, 2nd Baron Windlesham, was a Lieutenant General in the Grenadier Guards. They are closely related to the Franco-Irish Cognac Hennessy family.Political career
Hennessy was elected to Metropolitan Borough of Westminster, Westminster Borough Council in 1958 to 1962, unsuccessfully contested Tottenham (UK Parliament constituency), Tottenham in 1959 United Kingdom general election, 1959, and entered the House of Lords as the 3rd Baron Windlesham upon his father's death in 1962, who died in a helicopter accident at sea, having been a brigadier in the Grenadier Guards. He joined the Government as Minister of State in the Home Office in 1970 to 1972; and from 1972 to 1973, in the Northern Ireland Office, after which he became Lord Privy Seal, Lord Keeper of the Privy Seal and Leader of the House of Lords in June 1973 until October 1974. He was appointed a Commander of the Royal Victorian Order (CVO) in the 1981 New Year's Honours. On 16 November 1999, he was created Baron Hennessy, of Windlesham in the County of Surrey after the House of Lords Act 1999, so that he could continue sitting in the Lords.Media
He worked for Associated-Rediffusion and was involved in ''This Week (ITV TV series), This Week''. He later joined the board of Rediffusion as Chief Programme Executive. His TV career continued as managing director of Grampian (1967–1970) and managing director of the Associated Television, ATV network (1974–1981). He was a director of ''The Observer'' from 1981 to 1989.Academic
Hennessy returned to Oxford, where he earned a DLitt, and was principal of Brasenose College, Oxford, Brasenose College from 1989 to 2002. He had also been a visiting professor at Princeton University in 1997 and 2002 to 2003.Family
Baron Windlesham married the fashion journalist and author Prudence Glynn in 1965. She died in 1986; he is survived by a son, James and a daughter, Victoria.Arms
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