The Manchester Arena Inquiry has adjourned for three weeks as its chairman Sir John Saunders considers the last, and most secret, part of the evidence. It involves the critical issue of why Salman Abedi was investigated by MI5 and found to pose no risk, and why his case was never re-opened.

At the centre of the Inquiry is a nugget of information which, MI5 says, cannot be trusted to the public, even five years after the attack.