A 15-year-old with a 'pathological use of violence' left an older lad fighting for his life after repeatedly stabbing him during an arranged fight.

Lewis Light, who was told by a judge 'You appear to derive pleasure from violence,' plunged the knife in with such 'severe force' it damaged a vertebra.

And taking the extraordinary step of allowing him to be named, Recorder Richard Davison added he had shown 'little or no remorse'.

Sitting at Swindon Crown Court on Wednesday, he jailed him for four-and-a-half years and also ruled that he was a dangerous offender.

That means he must serve three quarters of the jail time, which is three years, before he can apply for parole and added he will be on licence for a further four years.

Hannah Squire, prosecuting, told how the knifing took place as a result of an incident earlier in the day on Saturday, January 23.

Light and 18-year-old Ryan Hammond were involved in a punch up at the Brunel car park which was filmed on a mobile phone by a friend.

Despite pals telling Light to let the older boy get up, he repeatedly punched and kicked Mr Hammond as he got the better of him.

As a result of the footage being passed around, friends of Mr Hammond arranged for a showdown that night in Wharf Green.

Sam Ballagh, who did not know Light, was with about four other lads and stepped in to fight on behalf of another friend.

Light, who routinely carried a knife, arrived just after 7.30pm in a group of about 20 to 25 who also had weapons including a wrench and baseball bat.

A 14-year-old girl in that gang started to punch Mr Ballagh, who replied that he 'didn't hit girls'.

The defendant is then seen on CCTV going behind the victim and plunging the knife into his back before others joined a frenzied attack as he was on the ground.

Light repeatedly stabbed him, twice in the back and three times in the chest, with one of the blows also catching his arm.

The group then fled, probably on hearing a siren, 'like a swarm of bees' as Mr Ballagh limped back to McDonald's where staff and diners fought to stem the bleeding.

He was rushed to hospital in Bristol where it was found he had a punctured lung, lacerated liver, damage to a vertebra and massive blood loss.

Miss Squire said 'he was lucky to survive given his degree of blood loss' adding two litres had to be pumped out of his chest cavity, and he lost about eight pints in all.

Light, of Barnum Court, Rodbourne, admitted actual bodily harm on Mr Hammond and grievous bodily harm with intent to Mr Ballagh.

A victim personal statement from Mr Ballagh told how his promising career as a white collar boxer was now in ruins and he may have post traumatic stress disorder.

John Lamb, defending, said his client had only just turned 15 at the time of the incident and was very immature.

He said that he 'doesn't understand the permanence of his actions', and as he matured it was hoped he would grow out of seeking kudos from his peers by behaving like that.

Jailing him, the judge said: "You are very young to be in the dock of a crown court and you are here because you have pleaded guilty to two offences of violence.

"Both of them were premeditated. In the first you arranged to fight with Ryan Hammond, you repeatedly got the better of him and went on to kick and punch him many times including when he was on the floor.

"In the second incident it was arranged you would meet friends or associates of Ryan Hammond, and this included Sam Ballagh.

"You were in company with a lot of other people but you played a leading role. You had with you a knife.

"I have read in the pre-sentence report that that you had been in the habit of carrying a knife for two years.

"You used the knife to inflict multiple stab wounds to Sam Ballagh's chest and torso. The CCTV that I have seen shows that you began the assault by coming up behind him and stabbing him in the back.

"He had five or six stab wounds in all, causing a punctured lung and the liver laceration among other injuries.

"He very nearly died from trauma and blood loss and you have shown little or no remorse for what you did."

He added: "These offences were premeditated, you committed them to gain or maintain kudos, or notoriety.

"You said you would continue to fight anyone who challenges you. You appear to derive pleasure from violence."