Manchester Arena suicide bomber Salman Abedi should have been identified as a threat on the night of the attack by those in charge of security, a public inquiry into the May 2017 attack has found.
In his report examining security arrangements at the venue where 22 people were killed and hundreds were injured at the end of an Ariana Grande concert, Manchester Arena Inquiry Chairman John Saunders found there were a number of missed opportunities to prevent or minimise the "devastating impact".
Mr Saunders said he considered it likely Abedi would still have detonated his device if confronted "but the loss of life and injury is highly likely to have been less".
Manchester-born Abedi, of Libyan descent, walked across the City Room foyer of the venue towards the main doors and detonated his shrapnel-laden device, packed into his bulging rucksack, at 10.31pm on 22 May just as thousands, including many children, left the concert.
Hearings at the public inquiry into the circumstances leading up to and surrounding the attack have been ongoing in the city since September last year.
He said Arena operator SMG, its security provider Showsec and British Transport Police, who patrolled the area adjoining Manchester Victoria rail station, were "principally responsible" for the missed opportunities.
He added: "Across these organisations, there were also failings by individuals who played a part in causing the opportunities to be missed."
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Sitting at Manchester Magistrates' Court, Mr Saunders said: "I have concluded that there were serious shortcomings in the security provided by those organisations which had responsibility for it and also failings and mistakes made by some individuals.
"When the mistakes and shortcomings set out in the report are considered, it needs to be at the forefront of that consideration that responsibility for what happened, and for causing so many deaths and serious injuries, lies with Salman Abedi, the suicide bomber, and his brother Hashem, who assisted him with the preparations.
"Hashem Abedi is now serving sentences of life imprisonment for offences including the murders of 22 people.
"The brothers intended to cause as much harm as they could. No other person or organisation acted with the intention of causing any injury or with any idea their actions or lack of action would or could assist a suicide bomber to carry out his evil intentions."
