The killer of 11-year-old Rhys Jones is now locked up with some of Britain’s worst criminals after being moved to the “Monster Mansion” prison.
Sean Mercer, 32, has been transferred to the tougher jail - HMP Wakefield - while police investigate a suspected prison smuggling ring.
Fellow inmates at the brutal slammer, a Category A prison which was built as a house of correction in 1594, include black cab rapist John Worboys and Sarah Payne’s murderer Roy Whiting.
