Dean Cartwright’s victim required surgery after the assault – which the sheriff branded as ‘gratuitous, prolonged, and hideous violence’ – when the 24-year-old was sentenced at Dumbarton Sheriff Court last week.

Cartwright, who appeared from custody, previously admitted assaulting the man to his severe injury and permanent disfigurement on April 20 last year at a property in Vanguard Street, Clydebank.

Malcolm McLeod, fiscal depute, told the court Cartwright’s victim was there visiting a friend. Cartwright’s brother was also present and the men were drinking in the back garden.

The previous week, the windows of the property had been broken. Cartwright’s brother had thought the complainer was responsible, called Cartwright, and asked him to go to the house in question.

Mr McLeod said: “He arrived at around 5.30pm that afternoon. Without provocation, he struck the complainer on the back of the head with a glass bottle.

“He repeatedly punched him on the head which resulted in him falling to the ground.

“When he was on the ground, he [Cartwright] stamped heavily on him. He then stopped the assault and briefly returned to where the complainer was lying unconscious but was pushed away by [a witness] and left.” The court was shown CCTV footage of the attack which highlighted the serious nature of Cartwright’s attack.

An ambulance and police turned up at the property. Cartwright was eventually traced and was cautioned and charged in relation to the matter.

His victim suffered a fracture to his lower right jaw and a laceration above his left eyebrow. He had shoe marks on his face and was taken to the Western Infirmary in Glasgow where the forehead wound was treated with steri-strips.

The man was then taken to the Southern General where he was treated for a fracture to his right eye socket. He underwent an operation to have a metal plate inserted to fix the fractured jaw.

Joanna Mortimer, defending, said her client understood a prison sentence was inevitable.

She said: “He is a young man with a record that clearly does him no credit whatsoever. He is not someone with a significant history of violent offending.

“He is extremely disappointed in himself for becoming involved in this matter.” Ms Mortimer added: “Given the nature of the assault, he is perhaps fortunate not to find himself in a higher court facing more serious charges.

“He accepts the assault is a horrific assault and there is no getting away from that. In the sober light of day, he very much regrets his involvement.” Sheriff William Gallacher told Cartwright: “What was available to the court was information from a video recording.

“That showed you engaging in gratuitous, prolonged and hideous violence on an individual who was rendered unconscious. You were not interested in stopping until you achieved what you came for.

“You are a young man who has no regard for other people other than what you want to achieve. Offending in this way will not be tolerated. This is an act of the utmost gravity.” Cartwright was sentenced to 32 months in prison. He will be under supervision for one year upon his release.