A thug who slashed a fellow inmate because of his race has been given an extra seven year sentence.

Anthony Elliot is already serving life for an attempt to murder another inmate in Polmont Young Offenders Institution.

The High Court in Edinburgh heard that Elliott, 19, viciously slashed Umar Bhatti with a make-shift weapon, then wrote a letter saying he was sorry he hadn't killed him – echoing his boasts after the earlier jail attack.

Elliot, from Bute, used a razor blade stuck to a pen to slash Mr Bhatti's neck and arm, then chased his victim until brought down by prison officers. Elliot was found guilty at Falkirk Sheriff Court of assaulting Mr Bhatti, 19, to his injury, scarring him for life, after a jury watched CCTV footage of the incident.

The jury also decided the assault, on January 17, was racially motivated.

Sheriff Thomas McCartney sent the case to the High Court in Edinburgh for sentencing, where Lord Glennie told Elliot the attack was entirely unprovoked.

"What makes it even more serious in this case is that, far from showing any remorse, your only regret seems to be that you didn't kill your victim."

Mr Bhatti was treated in hospital after the attack. The court heard that Elliot had struck because Mr Bhatti was due to leave Polmont.

In July last year Elliot was given an Order for Lifelong Restriction – a life sentence keeping him in custody until the Parole Board are satisfied he no longer poses a threat.