Stone was born in Llanelli in Wales, and after qualifying as a doctor at Cardiff University and Westminster Hospital Medical School worked as a GP in and around Hendon.
He took on a number of patients from Hampstead Garden Suburb, at the time an area popular with left-wing politicians, one of whom was Harold Wilson, who went on to become Prime Minister of the United Kingdom.
His brother-in-law, Sidney Bernstein, was then commissioned by the British Government to make a documentary about the liberation of Belsen and the concentration camps, which may have been influenced by the letters Stone sent home to his wife, Beryl.
Stone also had a General Practice (GP) in Cricklewood Lane, London, for many years serving the local community.
He was knighted in 1970,[1][2] and later was created a life peer in the 1976 Prime Minister's Resignation Honours,[3] taking the title Baron Stone, of Hendon in Greater London, on 24 June 1976.