THE Manchester Arena bomber's brother - claimed to have played a key role in the atrocity - will be extradited to Britain by Christmas, authorities have said.

Libyan prime minister Fayez al-Sarraj confirmed that it was only a "matter of time" until Hashem Abedi, the younger brother of Salman Abedi who detonated a bomb at an Ariana Grande concert on May 22 last year, was sent to the UK.

4 Hashem Abedi has been claimed to have had a 'key role' building the explosive device that killed 22 people at the Manchester Arena attack Credit: Special Deterrent Force

Greater Manchester Police want to arrest him for murder, attempted murder and conspiracy to cause an explosion.

"I think from here to the end of this year we will finish all the legal procedures in Libya," he told the BBC in Italy.

"We are fully cooperating because we understand the suffering of the families of the victims of this terrorist attack. We as Libyans also suffer here in Libya from attacks. So the subject is important for us.

"According to the general prosecutor we can extradite. After we complete the legal process in Libya, it is only a matter of time."

4 CCTV images of Salman on the night of the atrocity Credit: PA:Press Association

Mr Sarraj denied Libya had delayed Mr Abedi's extradition and said legal procedures were reaching their conclusion.

"We are not delaying, but this is a legal process," he said.

"Sometimes it takes a long time, even in other countries.

"So the case needs time, and as a country we are following up, and working with the British Embassy."

4 A photograph of Hashem Abedi, the younger brother of the Manchester bomber, holding a firearm Credit: facebook

He has been in custody in Libya since the blast.

In November last year he was subject to a request for extradition by British authorities.

A spokeswoman for Greater Manchester police said: "The extradition proceedings are in progress and we are grateful to the Libyan Authorities for considering our extradition request.

"As proceedings are ongoing, it is essential that we respect the Libyan legal process and therefore we cannot provide any further detail at this time."

4 Stranded concert-goers wrapped in thermal blankets wait by police van after the bombing Credit: Dave Nelson

A Home Office spokesman said: "In the case of the Manchester Arena bombing there is an active criminal investigation ongoing and the extradition of a suspect from Libya is being sought. It is important that these processes are not prejudiced or undermined.

"This was a callous and evil act and the victims and their families deserve and demand justice. They must remain our priority and we will therefore not be commenting further on the extradition so as not to jeopardise the investigation."

Manchester Arena terror attack survivors Lucy Jarvis and Millie Robson talk about their injuries on This Morning

The Abedi family, originally from Libya, fled during the Gaddafi dictatorship with the father returning to fight with opposition forces when the uprising began in 2011.

Both brothers travelled to Libya in April 2017, then Salman returned alone before carrying out the suicide attack in Manchester.

He detonated his device at the end of the concert, with 353 people, including 175 children, around him in the foyer of the venue.

As well as the 22 dead, 16 people suffered serious injuries including paralysis, loss of limbs, internal injuries, and serious facial injuries involving complicated plastic surgery.

Theresa May pays tribute to how Britons responded to the Manchester Arena terror attack