Charles Bronson, another infamous prisoner, allegedly "hated" Maudsley and was aware of his aversion to whistling, something that would prove particularly useful to the con

A killer deemed so dangerous he's said to be confined in a glass cage beneath a notorious prison is reportedly triggered by whistling.

Robert Maudsley, 70, who was convicted of murder in 1974, has spent 45 years in solitary confinement. He currently resides in HMP Wakefield, a category A men's prison in Yorkshire dubbed the 'Monster Mansion' due to its high-profile offenders.

Its notable current and former inmates include Ian Watkins, Roy Whiting, Ian Huntley, Harold Shipman and Charles Bronson. Bronson, another infamous prisoner, allegedly "hated" Maudsley and was well aware of his hatred for whistling.

In their new book, Inside Wakefield Prison: Life Behind Bars in the Monster Mansion, Jonathan Levi and Emma French have detailed the disturbing reason why Maudsley was so bothered by this seemingly innocent habit.

A prison source named Jo told the authors: "His mother was vile to him. It's said she locked him in the cupboard and whistled..."

They continued: "I remember going on the CSC and it wasn't my wing: I was on C wing and then I changed over to the A wing for about two and a half years.

"I'd come from New Hall. I was walking, whistling and they were saying, 'Ma'am, you can't whistle'. I said, 'You what? You're telling me not to whistle because it upsets a 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", reportedly had a feud with Bronson, who is known as one of the UK's most violent offenders, with the pair "tormenting each other" behind bars.

The authors described how Maudsley would loudly play rock music to "annoy" Bronson, who would "shout" at the killer as the music would be audible through the cell walls, but Maudsley would ignore him.

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

After learning about this dismissal, Bronson was furious, calling Maudsley "an ungrateful b***ard." He then threatened him, saying: "I pray to one day bump into him at 300mph and, unlike him, I don't need a blade."

Maudsley's initial conviction came after he throttled paedophile John Farrell in Wood Green, London, after the child molester showed Maudsley photos of children he had sexually abused.

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

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