LONDON — A suicide attack at a concert by pop star Ariana Grande in Manchester in May might have been foiled had investigators grasped the importance of highly relevant intelligence that passed their desks, according to a report commissioned by the British government.
‘‘It is conceivable that the Manchester attack in particular might have been averted had the cards fallen differently,’’ the review concluded, noting that the bomber, Salman Abedi, 22, had been a former subject of interest but had not been under active investigation at the time of the attack.
Abedi detonated a bomb at Manchester Arena, killing 22 people and wounding 100.
The suicide bombing was one of four terrorist attacks in Britain this year that were studied by David Anderson, a former independent reviewer of terrorism legislation. He was allowed to examine nine classified internal reviews conducted by counterterrorism police and MI5.