One of Britain's most notorious serial killers has set a new world record for time spent in a solitary confinement.
A man labelled as one of Britain's most dangerous criminals, first committed murder came in 1974 with the killing of 30-year-old John Farrell in London.
The killer surrendered himself to the police, saying that he needed psychiatric care instead of going to prison.
Come the trial, this infamous killer was deemed unfit to stand, so was sent to Broadmoor Hospital instead.
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This man in question is Robert Maudsley, who is Britain's longest serving prisoner after being locked up for a staggering 49 years.
In 1977, Maudsley continued his wicked ways as he and fellow resident David Cheeseman locked themselves in a cell with David Francis, who would ended up being Maudsley's second victim.
A convicted child molester, Francis was tortured to death over a period of nine hours.
Maudsley was subsequently convicted of manslaughter and sent to Wakefield Prison, where he was sentenced to life in prison under the recommendation that he should never be released.
The killer then murdered two more people while in prison in 1978, both of which were on the same day.
His first victim of the day was Salney Darwood, who was serving life for the manslaughter of his wife Blache.
Meanwhile, Williams Roberts was also killed - he was serving seven years for sexually assaulting a seven-year-old girl.
Terrifyingly, Maudsley was planning on murdering seven people that day, but failed to lure other prisoners into his cell.
Maudsley admitted to the murders straight away, as he told an officer that the next roll call would be two short.
Due to his actions, Maudsley has set a world record for the most time spent in a solitary confinement after spending 16,400 days alone.
As you'd expect, Maudsley will die in Wakefield Prison, in a cell which is specifically built for him and away from any other inmates.
The cell measures 18 foot by 15 foot, and is constructed from bullet proof perspex.
He spends 23 hours of each day in the confined cell, sleeping on what sounds like a very uncomfortable concrete slab.
Maudsley also has access to a toilet and sink which are bolted to the cell floor.
The killer has been repeatedly refused time with other human beings, but is now said to be 'happy and content in solitary'.
As revealed in Channel 5's HMP Wakefield: Evil Behind Bars, Gavin, Maudsley's nephew, received a letter from the killer warning that he would kill again if he was ever released.
Callum Jones