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A double murderer dubbed 'the most dangerous man in Australia' cannot be sent back there despite violently attacking his former partner in the UK.

Francis Carter, 71, spent 25 years in behind bars for killing two men in Australia, but authorities there will not take him back when he walks free from a UK prison after judges in Queensland said the monster should never be released, a court has heard.

The killer, who moved to Australia from Britain in 1973, beat a man to death with a baseball bat before slitting his throat and dumping his dismembered body in a barrel. He was jailed for the murder in 1989.

Then, while in prison, Carter escaped and spent a week on the run before he was recaptured and thrown back in jail.

But, behind bars once again, he then 'mutilated' and murdered an inmate he believed had told prison authorities about his escape plan.

The double killer was released from the Southern Queensland Correctional Centre, west of Brisbane, in 2015 and sent back to the UK.

Carter was described by author Paul Kidd as 'the most dangerous man in Australia' in his 1993 book Never to be Released, which explores some of the worst prisoners in the country's history and what crimes they committed to be put behind bars for good.

He has now been jailed once again after brutalising his ex-partner in an attack that left her covered in bruises and blood staining the walls of every room in his home in January this year.

'Violent' double murderer Francis Carter, 71, cannot be sent back to Australia despite violently attacking his former partner in the UK

He was released from an Australian prison in 2015 after 25 years behind bars for beating his friend to death and killing an inmate he believed had informed on his prison break plans

Australian authorities will not take him back following his conviction for assault occasioning actual bodily harm, despite a judge in Sussex saying Carter still presented the threat of 'explosive violence'.

Witnesses said the victim looked like she'd been bashed to pieces, prosecutor Beverly Cripps told Lewes Crown Court.

Ms Cripps said: 'She said she had been hit by Carter. She had bruising to forehead, nose, lip, side of her face, cut to her hand, bruising to chest.

'She said after difficulties with the relationship she was collecting property from his house.

'He appeared without warning and threw her to the floor, kneeling on her chest. He punched her a number of times.

'She said he had his hand round her throat and her mouth filled with blood. He handed himself in the next day.'

Tom Copeland, defending, said Carter has a mild heart condition. The killer's lawyer told the court: 'He's genuinely sorry and addressing his drink problem.'

Judge Martin Huseyin said: 'This was a serious assault of its type. She was someone you'd established a relationship with.

Carter had also been involved in armed robberies, break and enters, attacking a prison officer with an iron bar in an attempt to obtain keys to the sex offenders yard as well as assaulting inmates in this area of the prison

'There was never any question of her being able to defend herself meaningfully against you.

'You are a powerfully built man. There was blood from her in every room. You are someone who has a history of the most serious type of violent offending.

'You committed two murders. You still carry the danger of explosive violence and serious injury to others from that.

'That remains a risk factor and I think will remain a risk factor. Reduced, but still there. There is still the danger of very serious violence from you.

'The chief harm was not the physical injuries, but the terror, fear and distress which must have been very considerable indeed for someone who knew your history.'

The judge said that despite being released on life licence, the Australian authorities did not want Carter back.

He was jailed for 18 months with at least 40 per cent to be served in prison, however Carter will be released within weeks due to time already served.

He will also be under a restraining order for the next seven years despite judges recommending that he should never be released after his second murder conviction.

Detective Inspector Sarah Masters said: 'I want to commend the victim for her bravery in reporting this matter, and I would also like to thank the neighbours who helped her on the night.

'Tackling violence against women and girls (VAWG) is a top priority for Sussex Police, and we work hard to both support victims and to catch offenders.

'This was a shocking case, and Carter is now serving a custodial sentence. He is also the subject of a restraining order to restrict any future contact with the victim.

'We encourage all victims of domestic abuse and violence to report their experience to the police.'

At the time of his release in 2015 it was reported by Australian media that Carter 'nearly decapitated' his first murder victim, his friend Phillip Harold Clayton, 'for talking to his girlfriend at a barbecue' in 1988.

Carter was concerned that Mr Clayton would be able to identify him to police after being repeatedly beaten with the baseball bat so he asked his victim if he could do so.

When Mr Clayton said he could identify Carter, the violent murderer told him 'I'm not doing 15 years for this' before slitting the victim's throat.

Two years later in 1990 while he was behind bars, Carter and an accomplice stole knives from the prison before 'mutilating' and murdering fellow inmate Scott Wallace.

During sentencing for Carter's second murder, the judge said he believed the 71-year-old would murder again if he was released.

Carter had also been involved in a series of violent crimes previously, including armed robberies, break and enters, attacking a prison officer with an iron bar in an attempt to obtain keys to the sex offenders yard as well as assaulting inmates in this area of the prison.