Harold Shipman: also known as "Dr.Death"; doctor convicted of 15 murders; a later inquiry stated he had killed at least 215 and possibly up to 457 people over a 25-year period.

Fred West and Rosemary West: also known as "House of Horrors" murderers; she was convicted of 10 murders; both are believed to have tortured and murdered at least 12 young women between 1967 and 1987, many at the couple's home in Gloucester; he committed suicide in 1995 while awaiting trial.

List of serial killers by country - Wikipedia, the free encyclopedia