John Leonard Knox  Sir John Leonard Knox (6 August 1925 – 28 May 2015) was a British High Court judge, sitting in the Chancery division. He was appointed on 26 July 1985, and retired on 30 September 1996. Whilst sitting he was styled as Mr Justice Knox or Knox J.  Prior to his elevation to the bench, Sir John practised as a barrister from Radcliffe Chambers. He served as Attorney-General of the Duchy of Lancaster from 1984 to 1986. Notable judicial decisions that Knox J was involved in included: