John Manningham-Buller, 2nd Viscount Dilhorne

John Mervyn Manningham-Buller, 2nd Viscount Dilhorne (born 28 February 1932) is a British barrister and peer.

Lord Dilhorne is the son of Reginald Manningham-Buller, 1st Viscount Dilhorne, and Lady Mary Lindsay, daughter of David Lindsay, 27th Earl of Crawford. His sister is Eliza Manningham-Buller, Baroness Manningham-Buller, the former head of MI5. He was educated at Eton and the Royal Military Academy, Sandhurst.

After service in the Coldstream Guards, Dilhorne was called to the Bar from the Inner Temple in 1979. He was Managing Director of Stewart Smith (LP&M) Ltd from 1970 to 1974 and Chairman of the Value Added Tax Tribunal from 1988 to 1995, a member of Wiltshire County Council, 1967 to 1970, of the Joint Parliamentary Committee on Statutory Instruments, 1981 to 1988, of the JPC on Consolidation Bills, 1994–1999, and of the EC Select Committee (Law and Institutions), 1989–1992.

Lord Dilhorne married, firstly, Gillian Stockwell, on 8 October 1955, and they were divorced in 1973. They had three children:

• Hon. James Edward Manningham-Buller (born 1956)
• Hon. Mervyn Manningham-Buller (born 1962)
• Hon. Mary Louise Manningham-Buller (born 1970)

He married, secondly, Dr Susannah Jane Eykyn on 17 December 1981. She is a professor of clinical microbiologyassociated with St Thomas' Hospital.

The Dilhornes have homes in London and at Minterne Parva, Dorset.