As he begins his life sentence for the murder of five-year-old April Jones, Mark Bridger joins a small group of prisoners whose crimes were deemed so appalling they will spend the rest of their lives in prison.
According to Ministry of Justice figures, today's sentence takes the number of prisoners for whom life means life to 48.
Notorious cases include Moors Murderer Ian Brady and murderer and robber Donald Neilson, "The Black Panther", who shot and killed three sub-postmasters.
In 2008 club bouncer Levi Bellfield was told he would die in prison for murdering two young women and trying to murder a third.
In the same month, Steve Wright was also given a "whole life" term for the murders of five prostitutes in Ipswich
The only woman on the list is Rose West, who was convicted in 1995. A killing spree with husband Fred saw 10 young women murdered - eight within a two-year period.