Leonard was called to the bar in 1951 . He entered the chambers of John Buzzard and specialised in criminal cases . He generally though not invariably appeared for the prosecution . In 1964 , he became the central criminal court 's second junior prosecuting counsel , and took silk in 1969 . His '' Telegraph '' obituary describes him as a " shrewd prosecutor and deadly cross-examiner " , adding that his style was " fair and understated , precise rather than flamboyant . " As a barrister , he was involved in the prosecutions of Emil Savundra for fraud , of the Kray brothers for the murders of Frank Mitchell and Jack McVitie , of Graham Young for poisoning several colleagues with thallium in their tea , and of George Ince and others for the so-called " Barn Murder " of Muriel Patience . He also repeatedly defended Patrick Armstrong , one of the Guildford Four , whose conviction for the Woolwich and Guildford pub bombings was eventually overturned
Guildford pub bombings
Guildford pub bombings
John Leonard (judge)