A man murdered his flatmate’s lover after he flew into a rage when they woke him by accident.

Robert Kay, 36, knifed Carlo Volante in the heart and chest before slashing his throat.

The victim’s traumatised girlfriend Mhairi Hughes yelled: “You’re going to kill him” before Kay said, “You’re f*****g right, he’s dead.”

Frantic Mhairi stood over her doomed partner following the street bust-up pleading: “Don’t die, baby.”

The High Court in Glasgow yesterday heard Kay was livid at being roused around 2pm by lodger Mhairi and Carlo, 40, in Bonnyrigg, Midlothian.

Prosecutor Angela Gray said the pair decided to go to her mum’s house but added: “In doing so they also woke up the accused who shouted ‘get f*****g out.'”

A row erupted, and Mhairi chose to move out on the spot and began packing her gear with Carlo.

But as he took bags outside, Kay raced after him with the weapon and stabbed him on the ground.

Carlo had 14 sharp blade injuries including a wound to his jugular vein.

Paramedics battled to save him at the scene before he died shortly after arrival at Edinburgh Royal Infirmary.

Kay yesterday admitted the murder on January 3. Defence lawyer Donald Findlay QC said Kay has no memory of the killing.

Sentencing was deferred.