Warner was educated at Trinity College, Cambridge, serving as an officer of the Rifle Brigade during the Second World War before starting his career as a barrister.
Appointed Advocate-General in 1972, he returned to England in 1981, where he was made a judge of the High Court of Justice, retiring in 1994 and dying in 2005.
[1] After leaving Harrow he went to Trinity College, Cambridge to study history before being commissioned into the Rifle Brigade as a second lieutenant on 23 October 1943.
[1][2] He later served on Lord Mountbatten's personal staff, becoming an acting major by the end of the Second World War at the age of 22.
[4] After returning to Britain in 1981 he became a judge of the High Court of Justice's Chancery Division on 3 March,[5] receiving the customary knighthood on 20 May 1981.