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David was born in Godley, Hyde, near Manchester, in 1939 and was educated at De La Salle grammar school in Salford. He qualified from Manchester University in 1964, and in 1971 he was awarded a doctorate for research into the treatment of urinary tract infection in general practice. He then joined the Peterloo Medical Centre in Middleton as a junior partner and remained there until his retirement in 1999.