Horrific CCTV footage of rising gang violence in the UK which lead to the brutal knife death of a 15-year-old boy has been released.

The video shows two warring crime groups - known as the V2 and V3 - fighting with machetes on the streets of Wolverhampton on May 29, 2018, just hours before the "well-planned" killing of Keelan Wilson.

Footage of the horror scenes was released during a court case.

The court heard just 90 minutes after the brutal fight in the city's Victoria Street that trouble flared again in Legge Street and Keelan was chased by two men – one who was on a bike – before being shot at with a shotgun, Birmingham Live reports.

Keelan and his mum Kelly

Jurors were also told that a Honda 'associated with Keelan' had driven into the bike beforehand.

Michael Duck QC, prosecuting, told the jury that the youngster – who was described as an angel – was targeted after becoming embroiled in gang culture in early 2018.

And he added that the youth may have switched allegiances between the rivals.

Brian Sasa, Tyrique King, Zenay Pennant-Phillips and Nehemie Tampwo ran up towards a taxi in Langley Road and pulled open the rear of the door and set about with weapons.

Keelan was knifed more than 40 times, at least three of which could have been fatal individually before they ran off.

Despite the efforts of medics at hospital he died a short time later.

"There was plainly a plan to execute retribution on Keelan Wilson. This was not a murder by chance, it was a murder by design and plan," Mr Duck said.

"It is not just the fact they were prepared to take that life but the manner in which they chose to do it.

"This was not in any way a spontaneous act of violence.

"This was a well-planned, targeted group attack by a number of youths armed with knives, and that was with the plan to execute another young man."

Mr Duck added: "That act was committed by the group under the gaze of the public.

"If you, as a group, are prepared to behave in that way with people watching, what does that tell you about the group? They thought they were something akin to untouchable.

"That act inflicted these 40-plus wounds on that young man.

This was not an attack by a single weapon.

"It means that, as awful as it is to consider... each member of that attacking group had been part of an agreement to end Keelan Wilson's life at 11pm that night by inflicting the most appalling violence on him."

Sasa, of Long Ley, Heath Town, King, of Chelwood Gardens, Wolverhampton, Tampwo of Fern Grove in Bletchley, Milton Keynes, and Pennant-Phillips, whose address cannot be published for legal reasons, have all been found guilty of murder.

His grandfather George Ellitts paid an emotional tribute.

He said: “To me, he was an angel.”

"He's lived with me all my life.

"He raised a few hundred pounds for Great Ormond Street Hospital a few years back, he had his hair cut, he had the lot off."

David Jamieson, the West Midlands Police and Crime Commissioner, said: "For anyone to have their life taken in this way is truly heart-breaking. For this to happen to someone so young is almost incomprehensible.

“The killing has devastated the victim’s family, friends and the wider West Midlands."