Sir Norman James Blacklock KCVO OBE FRCS (5 February 1928 – 7 September 2006) was a surgeon in the Royal Navy and later a consultant in urology and professor of medicine at Manchester University. He served as Medical Officer to The Queen on her overseas tours for 17 years, from 1976 to 1993. He became known to the accompanying press corps as "the Queen's Witch Doctor", and the Duke of Edinburgh nicknamed him "Hemlock". He was appointed an Extra Gentleman Usher in 1993. He died on the afternoon of his 50th wedding anniversary after a fall on a staircase in Portsmouth.