The mother of murdered toddler James Bulger plans to address a parole hearing for killer Jon Venables in the hope of preventing his release.

Denise Fergus will argue that Venables, who was aged ten when he and classmate Robert Thompson abducted and murdered two-year-old James, is a psychopath who remains a danger to society.

Thompson and Venables were jailed for life but released on licence with new identities in 2001.

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James Bulger was abducted and murdered 20 years ago

Venables, 30, had his parole revoked in 2010 and was jailed for two years after admitting downloading and distributing indecent images of children.

Now he has made a fresh application for release and the hearing is expected to take place in the coming months.

Ahead of Tuesday's 20th anniversary of her son's death, Mrs Fergus, 45, spoke of her hopes to address the parole panel via a video link.

Speaking alongside her second husband Stuart, 37, she said: "My message to them is don't release him, I think Venables is still a danger to the public."

Mrs Fergus, from Kirkby, Merseyside, believes there are indications that Venables is an "undiagnosed psychopath" who should be moved to a hospital unit.

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Jon Venables (left) and Robert Thompson were jailed for life but released on licence in 2001

"I have very serious concerns that the parole board's approach to Venables is fundamentally flawed," she added.

"People say children are not born evil but I strongly believe that he was.

"He has proven this by offending after his first release, with all the things he had on his computer. He had indecent images of children who were as young as two.

"To have killed a child and been released on licence and then collected these images on a computer, he can't be right in the head.

"I'm not saying he should never be released, I don't believe that. But now is not the right time because he is a danger."

Venables and Thompson abducted James from the Bootle Strand shopping centre on Merseyside before torturing and killing him.

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Denise Fergus believes Venables is an 'undiagnosed psychopath' who is still a danger and should not be released

The two boys, who were truanting from school, walked James around the streets of Liverpool for more than two miles, stopping occasionally to kick and punch him.

They told adults who intervened that he was their brother. After taking him to a nearby railway line, they left his body on the tracks in the hope it would be destroyed by a train.

The toddler had been splattered with blue paint and his battered head lay surrounded by a pile of bricks.

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CCTV showing James being led to his death

His body was found two days later by children playing on a freight railway line.

Mrs Fergus married electrician Stuart in 1998 following the end of her marriage to James' father, Ralph.

Mr Bulger, who is releasing a book called My James, spoke last week of how, in his darkest moments, he blamed Denise for letting their son out of her sight - a reaction which now makes him feel deeply ashamed.

He also said he downed two bottles of whisky a day to blot out the pain and that he thought about killing himself in the wake of the tragedy.