Southport triple killer Axel Rudakubana is facing 52 years in solitary confinement, according to a former inmate who was in prison alongside him.

The 19-year-old has already been segregated after he allegedly threw boiling water at a guard at HMP Belmarsh in south east London.

It is understood that Rudakubana, who has been in jail for less than a year, is also being kept apart from other inmates due to fears for his safety.

The incident, which is still under investigation by the Met Police, is said to have involved Rudakubana boiling a kettle in his cell and throwing the scalding water through a hatch in May.

Rudakubana was jailed for at least 52 years for killing Bebe King, six, Elsie Dot Stancombe, seven, and Alice da Silva Aguiar, nine, as well as the attempted murder of eight other children and two adults at a Taylor Swift-themed dance class.

He is likely to be behind bars until he is 70 after being handed the longest sentence ever given to someone of his age – though experts say it is unlikely he will ever be released.

‘He is being shown no mercy in prison,’ a former inmate who served time alongside Rudakubana told The Sun.

‘He is at risk every day and was incredibly stupid to “kettle” the screw so early into his sentence. I wouldn’t be surprised if he spends the rest of his sentence in solitary.

‘All the inmates hate him and the prison officers won’t be happy with him either because he attacked one of their own. He will have nothing to help him pass the time.’

The insider said Rudakubana is now being treated as even more dangerous – and won’t be receiving any privileges.

The teenage killer was moved to the Contingency Suite at Belmarsh after the reported attack on an inmate, in a bid to separate him for his own safety and that of prison officers.

Rudakubana’s former prison pal said that a guard sits outside the suite ’24 hours a day and checks on the prisoner every 30 minutes’ with only the ‘governor and one officer having a key.’

The prison source added Rudakubana was ‘living like a tramp’ and was not washing or cutting his hair.

They said that he had lost weight and was hiding sleeping pills, believing that ‘he was planning to kill himself in some final act of control towards his victims’ families’.

Merseyside Police said Rudakubana’s parents could still face criminal charges after confirming they are assessing the testimony they gave to the public inquiry.

Alphonse Rudakubana admitted on oath that he and his wife knew their ‘monster’ son had amassed an arsenal of knives and other weapons and was planning on carrying out an attack on his old school a week before he went on the rampage with a knife at a Taylor Swift-themed dance class in July last year.

But the couple, who survived the genocide in their home country of Rwanda before being granted asylum in the UK, failed to alert police or any other agency.