SERIAL killer Peter Tobin has been diagnosed with cancer, according to reports.

The 72-year-old is also said to be so frail that he barely leaves his jail cell at HM Prison Edinburgh.

According to the Daily Record, Dan McNicol, brother of Dinah, who was one of Tobin’s victims has issued a plea for Tobin to reveal everything he has done.

Dan said: “I hope he finds something in himself to tell the truth about what else he has done and other women he has killed so their families have some closure.”

Tobin, from Johnstone in Renfrewshire, is currently serving life sentences in prison murders of Angela Kluk, 23, Scottish schoolgirl Vicky Hamilton, 15, and Dinah from Tillingham, Essex.

Tobin - who pretended to be a church handyman and used a false name - left slightly-built Ms Kluk with severe head injuries and multiple knife wounds after subjecting her to a sexually-motivated attack in September 2006.

Police found the young woman's body in a space beneath the St Patrick's Roman Catholic church in the Anderston area of Glasgow.

Her body had been dumped through a hatch in the chapel floorboards next to the confessional box, with her hands bound and her mouth gagged.

Police set up Operation Anagram in the wake of the murder and followed a trail of clues to the garden in Irvine Drive, Margate, Kent, where they unearthed the remains of both Ms Hamilton's remains and fellow missing teenager Ms McNicol.