Peter Riddle was a well-known urologist who worked all his consultant life in London. He was emeritus surgeon at University College London and at St Peter's Hospital, and had been sub-dean at the Institute of Urology. He was born on 1 September 1933. His father, Leonard, was an assurance broker and

Melvyn Roland Griffiths (Mel) Robinson was a consultant urologist at Pontefract General Infirmary. He was born on 17 May 1933 in Wolverhampton, the son of Noah Robinson, a managing director in the pressed steel industry, and Hilda Emily Robinson née Griffiths, a secretary. He attended St Agnes’ Prep