MPs reviewing the 2017 terror attacks say MI5 has accepted it made a mistake in not tracking the Manchester bomber.
A report by the Intelligence and Security Committee said MI5 recognised it had moved “too slowly” to establish how dangerous Salman Abedi, 22, was.
Martin Hibbert, injured in the blast, said the truth was now coming out.
And Dan Hett, from Survivors Against Terror – who lost his brother Martyn in the attack – said the “litany of mistakes in 2017 must urgently be learnt from”.
In wide-ranging criticisms, the committee said the government had also failed to fully learn lessons from attacks dating back 13 years.
Abedi is believed to have been taught bomb-making while in Libya, before returning to Manchester in May last year to construct his device.
He walked into the foyer of Manchester Arena, where thousands had been watching US singer Ariana Grande perform, and blew himself up.
A previous report into the attack revealed that MI5 had planned to review the risks posed by Abedi – but the meeting was not scheduled to take place before the attack occurred.
In its findings, the ISC said there had been “no follow-up action” after Abedi visited a jailed terrorist organiser from Manchester.
Last December, an independent…