Frighteningly, the whistle is banned next to the glass cage of Britain’s worst killer

A notorious murderer, believed to be kept in a glass cage beneath the infamous HMP Wakefield, is said to be triggered by the sound of the whistle.

Robert Maudsley, now 70, was found guilty of murder in 1974 and has since spent 45 years in solitary confinement. He is currently held at HMP Wakefield, a Category A men’s prison in Yorkshire, often referred to as the ‘Monster’s Mansion’ due to the number of high-profile criminals it houses.

The list of current and former inmates of the prison includes Ian Watkins, Roy Whiting, Ian Huntley, Harold Shipman and Charles Bronson. Bronson, another notorious inmate, reportedly “hated” Maudsley and knew all too well of his aversion to whistling.

In the new book Inside Wakefield Prison: Life Behind Bars in the Monster Mansion, authors Jonathan Levi and Emma French explore the chilling reasons behind Maudsley’s intense reaction to what many would consider a harmless activity.

A prison insider named Jo shared with the authors: “His mum was mean to him. They say she locked him in the cupboard and whistled…” reports the Mirror.

They added: “I remember going to CSC and it wasn’t my wing: I was on C wing and then I went to A wing for about two and a half years.

“I came from New Hall. I was walking, whistling, and they were saying, “Ma’am, you can’t whistle.” I said “You what? You tell me not to whistle because it upsets a man”. con?’.

“It was just weird. He hated Bronson and Bronson hated him. Bronson used to whistle sometimes.”

Maudsley, also known as “Hannibal the Cannibal” and “The Brain Eater” after reports falsely claimed he ate part of the brain of one of the men he killed in prison, is said to have had a falling out with Bronson, who is known as one of Britain’s most violent criminals, with the two torturing each other behind bars.

The authors described how Maudsley would play rock music loudly to “annoy” Bronson, who would “strip” at the killer as the music would be heard through the cell walls, but Maudsley ignored him.

Bronson was later transferred to HMP Woodhill and bizarrely sent Maudsley a watch as a present. He was then rejected by Maudsley, who instructed a prison guard to throw him in the bin.

Upon learning of this dismissal, Bronson was furious, calling Maudsley “an ungrateful scoundrel”.

He then threatened him, saying, “I pray one day I hit him at 300 mph, and unlike him, I don’t need a blade.”

Maudsley’s original conviction came after he sprayed pedophile John Farrell in Wood Green, London, after the abuser showed Maudsley photographs of the children he had sexually abused.

He was deemed unfit to stand trial and sent to the notorious Broadmoor Hospital, and in 1977, Maudsley and fellow inmate David Cheeseman tortured child abuser David Francis to death for nine hours.

He later strangled and stabbed Salney Darwood and then stabbed pedophile Bill Roberts. Maudsley was then given a life sentence and was later reportedly placed in a Plexiglas box in the basement for 23 hours a day.