JACK the Ripper who stalked London more than 130 years ago was a demon barber with a taste for human flesh, according to startling new scientific evidence.

A blood-covered shawl found at one of the murder scenes is believed to contain DNA from both butchered victim Catherine Eddowes and the world's most infamous serial killer.

Scientific evidence is now said to point to Polish barber Aaron Kosminski

Researchers at Liverpool John Moores University conducted genetic tests on the sample long-thought to have belonged to the Ripper himself, who they now believe to be Pole Aaron Kosminski.

"We describe for the first time systematic, molecular level analysis of the only surviving physical evidence linked to the Jack the Ripper murders," the authors  wrote in the Journal of Forensic Sciences.

"Finding both matching profiles in the same piece of evidence enhances the statistical probability of its overall identification and reinforces the claim that the shawl is authentic."