Levi Bellfield is the only prisoner in British history to be serving two ‘whole life’ sentences, without the possibility of parole (Picture: PA)

One of the UK’s most feared serial murderers has reportedly confessed to killing a fourth victim.

Levi Bellfield, 54, is serving two life sentences at HMP Frankland, without the possibility of parole, for the murders of Amelie Delagrange, 22, in 2004, Marsha McDonnell, 19, in 2008, and Milly Dowler, 13, in 2011. 

Now, he has allegedly signed a written confession ‘admitting’ to killing 19-year-old student Elizabeth Chau, The Sun reports. 

One day in April 1999, Ms Chau, who was born in Vietnam, went missing from her home in Ealing, west London.

CCTV footage caught her walking from Thames Valley University on Uxbridge Road, but she was never seen again. 

Her family, who still live in the capital, have never given up hope of finding her.

Ms Chau’s sister, Bich, said: ‘We want Liz to know that we love her and miss her very much.’

The recent statement provided by Bellfield reportedly states he bundled Ms Chau into a van before murdering her, and is understood to include the location of her body. 

Bellfield was convicted of killing Amelie Delagrange, Marsha McDonnell, and 13-year-old Milly Dowler (Picture: PA)

Bellfield is also thought to have admitted in the note to five other attempted murders, as well as attacks on Sarah Spurrell, then 23, in Hastings, Jessie Wilson, then 17, in south-West London, and Sonia Salvatierra, 26, in Twickenham. 

Solicitor Theresa Clark claims Bellfield handed her the note earlier in March.

She said: ‘I have passed it to the police. He is likely to be interviewed under caution.’

Elizabeth Chau, then a 19-year-old student, went missing in April 1999 while walking home from Thames Valley University

Bellfield’s ‘confession’ is likely to have been written around the same time he got engaged to a regular female visitor at HMP Frankland.

The woman is thought to be in her 40s, and the pair were reportedly introduced by fellow serial killer Peter Sutcliffe, known as the ‘Yorkshire Ripper.’

News of the engagement was met with widespread public outrage, with then-Justice Secretary Dominic Raab vowing to try and prevent the marriage from taking place. 

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This has taken shape in the form of the government’s Victims and Prisoners Bill, which aims ‘to prohibit certain prisoners from forming a marriage or civil partnership’.

Bellfield is understood to be prepared to fight the proposed legislation, and has been quoted as saying that doing so is ‘costing me f*** all’.

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Police will reportedly question Bellfield over the 1999 disappearance of Elizabeth Chau.