Three men and two teenagers have been handed life sentences for the murders of two 17-year-old friends at a birthday party in Milton Keynes.
Dom Ansah and Ben Gillham-Rice were stabbed to death at a house in the Emerson Valley area of the Buckinghamshire town in October 2019.
Two other people were stabbed and left with serious but not life-threatening injuries.
On Wednesday, Earl Bevans, 23, Charlie Chandler, 23, Clayton Barker, 20, and two previously unnamed teenagers appeared at Luton Crown Court to be sentenced.
The court previously heard the defendants were either members or associated with members of the B3 gang in West Bletchley, named after the MK3 postcode, and had planned the attack after being told that members of the rival M4 gang were at the party.
Barker, Potter and both Chandler brothers had denied both murders and two counts of wounding with intent but were unanimously convicted by the jury after around nine hours of deliberation.
Mr Justice Spencer gave each defendant a life sentence, with minimum terms varying from 22 years in detention to 28 years in prison.
He said: “The five of you gatecrashed a 17th birthday party at a house in Milton Keynes, armed with knives and machetes, and with masks to conceal your identity.”
The court heard Ben was stabbed in the living room “whilst the party was in full flow, in the presence of several teenage boys and girls”.
Mr Justice Spencer said Dom had been subjected to an “appallingly brutal sustained attack” where he was repeatedly stabbed and later chopped with a machete, adding: “He was chased, running quite literally for his life.”
The judge said Barker, Potter and Jamie Chandler were “enthusiastic” members of the B3 postcode gang and Charlie Chandler and Bevans closely associated with them.
The court previously heard of an incident where Potter was stripped and assaulted in woodland when he was 14, and jurors were also told Jamie Chandler had been stabbed just months before the murders.
Both assaults were carried out by members of the rival M4 gang, of which Dom was said to be a member.
The judge said: “I have no doubt that these two incidents fuelled the desire on the part of members of B3 to have their revenge on members of M4 if and when a suitable opportunity arose.”
Later addressing Potter, Mr Justice Spencer said: “I have no doubt that your motivation related to the traumatic experience of the assault you had suffered yourself at the hands of M4 two years earlier. But that did not begin to justify your participation in these murders.”
Mr Justice Spencer said Barker, who played a leading role on the night, was “revelling” in what he had done.
He continued: “You were steeped in the gang culture of B3 to the point of obsession, preoccupied with violence and knives.”
The judge added the attack would have caused “untold trauma” to those who had witnessed it.
Bevans, of no fixed address, pleaded guilty at the start of the trial and was given life with a minimum term of 27 years.
Potter, of Chiswick Close, Westcroft, and Chandler, of Woodrush Close, Beanhill, were given a 22-year minimum term in detention.
All five were also given concurrent sentences for the two counts of wounding with intent.
Asked before sentencing whether the end of the process would bring any closure, Ben’s father Jason Rice told PA: “It gives you a little bit, maybe, of that chapter’s over, knowing that the people who (have) done it are behind bars, but no sentence will be enough.”
This was echoed by Dom’s mother Tracey Ansah, who said: “We just survive, every day. There’s no meaning to it, because he’s not a part of it.
“So no sentence will ever be long enough, and it’s not something you will ever recover from.”