A inmate in Wakefield Prison is being held in the UK’s most secure cell, a glass box under a prison, and he has been described as so dangerous he will never be released.

Robert Maudsley, known as “the brain eater” by other prisoners, was in his early 20s when he committed his first murder. He was jailed, but continued to kill inside.

He is now locked in a one-of-a-kind dungeon beneath Wakefield Prison.

The cell has been likened to the glass cage that housed serial killer Hannibal Lecter in the film Silence of the Lambs.

18ft wide by 15ft deep, it has huge bulletproof glass windows so Maudsley can be kept under constant observation.

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The only furniture in the cell is a table and a chair, both made of compressed cardboard, while his toilet and sink are bolted to the floor.

Maudsley's bed is a concrete slab and the door is made of solid steel, which opens into a cage just inside.

The cage is encased in thick, see-through, acrylic panels and has a small slit at the bottom, through which guards pass the serial killer his meals and other items he needs.

The unique 'glass cage' is in the basement of Wakefield Prison

Maudsley is locked in the cell for 23 hours a day, only being freed for a daily hour of exercise.

He is escorted to the exercise yard by six guards and is never allowed any contact with other inmates.

In an interview Maudsley said he felt "tormented" by his solitary confinement.

He explained: "There is a lack of hope and I don't appear to have anything to look forward to.”

Starved of company, he wrote a letter to The Times, asking: "Why can't I have a budgie instead of the flies and cockroaches and spiders I currently have? I promise to love it and not eat it."

In March 2000, he wrote another letter asking for a cyanide pill so that he could end his life.

Maudsley suffered a traumatic childhood, and endured violent and sexual abuse until he left home. He blames his upbringing for his later acts.

He said in 1979, when on trial for a double murder: “If I had killed my parents in 1970, none of these people need have died.”

No photographs of Maudsley have been taken in many years, and he is now said to be a frail, gaunt figure

Working as a male prostitute in London in 1974, Maudsley met Robert Farrell. Farrell paid him for sex, and then showed him pictures of children he had sexually abused.

Maudsley strangled Farrell, and he was later that year sentenced to sentenced to life imprisonment with a recommendation that he should never be released.

In 1977, Maudsley and fellow Broadmoor inmate, David Cheeseman, barricaded themselves in a cell with convicted child molester, David Francis.

For nine hours they tortured Francis in the most brutal way, eventually killing him.

Maudsley killed another inmate in the notorious Broadmoor prison

Inside the prison, Maudsley became known as "Spoons" because Francis’s body was reportedly found with a spoon sticking out of the skull and part of the brain missing.

After the murder, Maudsley was then moved to the maximum security Wakefield Prison in Yorkshire but a year after he murdered Francis he killed again.

On July 29, 1978, he garrotted and stabbed wife killer, Salney Darwood, in his cell and hid the body under the bed.

Maudsley then stalked the prison wing for his next victim and attacked Bill Roberts, who had been jailed for sexually assaulting a seven-year-old girl.

He stabbed Roberts to death before hacking at his skull with a makeshift dagger.

Maudsley lured two other Wakefield inmates to his cell and killed them

When Maudsley was certain Roberts was dead he calmly walked up to a prison guard and told him there would be two less mouths to feed at dinner that night.

Now deemed too dangerous to remain amongst the general prison population, work began on constructing the special cell for Maudsley in the bowels of Wakefield Prison.

He has been in that room since 1983, and is not expected to leave it alive.