(BBC) A police counter-terrorism security adviser said prior to the Manchester bombing the risk of an attack on crowds leaving an event was not considered.
Liz Forster, Greater Manchester Police’s principal adviser, told the public inquiry into the arena attack: “It’s changed the way we operate.”
Ms Forster agreed it was a watershed moment as the threat to crowds in the foyer was not “on our radar” then.
Twenty-two people died as they left an Ariana Grande concert in May 2017.
The inquiry at Manchester Magistrates’ Court is looking into the security advice police gave to the venue.
