An 'evil' killer has admitted murdering and decapitating his 21-year-old girlfriend before texting her mother pretending to be her.

Ewan Methven killed Phoenix Spencer-Horn at their home in East Kilbride, Lanarkshire, last November.

The 27-year-old postman later dialled 999 himself insisting he had a drug-induced blackout and could not remember what he had done.

But, it emerged he had also mutilated her body and pretended to her mother she was still alive while trawling the internet for porn for hours.

Methven today admitted the gruesome murder as he appeared in the dock at the High Court in Glasgow.