A BOY of 15 who left a man with a shattered jaw in an unprovoked attack in a Pinehurst street is facing the prospect of jail.

The teen approached the stranger from behind and smashed a metal bar in to the side of his head as he walked home from a shop.

Swindon Crown Court heard CCTV cameras picked up the boy appearing to demonstrate to his friends before the attack what he was planning to do.

While he admitted carrying out the attack he claimed he had not meant to cause any serious harm to the innocent victim.

But following a one day trial at Swindon Crown Court a jury found him guilty of causing grievous bodily harm with intent after hearing he admitted simple GBH.

The 28-year-old victim had just bought some ice lollies at the One Stop shop near The Circle when he was attacked as he walked home.

He told the court he was strolling along Limes Avenue when he was approached from behind and the metal bar smashed into his face.

Giving evidence he said he believed the weapon was an extendable baton and after the first blow landed his attacker swore at him and snarled: "Come on man."

Blood started to pour from his face as the teenager raised the baton again and swung with such force he dropped the weapon, missing him.

As he started to run away he said the thug picked up the bar and chased after him, but he managed to lose him, seeing him run past his house after he got to safety.

The jury was shown CCTV footage of the schoolboy, who cannot be named because he is under 18, with a number of his mates outside the Liquor World off licence in Whitebeam Court on December 30, 2017.

As they were larking about he appeared to demonstrate what he was going to do in a series of what prosecutors called practice swings.

The gang then moved off, he on foot and others on their bikes, up alleyways behind the shop to The Bungalows before he carried out the attack on Limes Avenue.

The victim was taken to hospital where he was found to have a badly broken jaw and a number of smashed teeth.

Speaking from the witness box the defendant could not explain why he had done it but said he had not meant to hurt his victim. "I wasn't aiming for his head. Just the back." He added targeted a second blow as because man didn't seem to have been hurt by the first.

The boy said that the footage outside the off licence was him and his mates 'play fighting' and he had not been planning the attack.

Colin Meeke, prosecuting, put to him that he was showing off to his mates and had just decided to go out and 'do someone', which he denied.

Following a morning of evidence the jury of five women seven men took a couple of hours to find him guilty.

Judge Jason Taylor QC adjourned the case until February 26 for a pre-sentence report and released the teenager on bail until then.