(BBC) Policy and procedures may have got in the way of a joined-up emergency response to the Manchester Arena bombing, a former police chief said.
Former Supt Craig Thompson took on the role of tactical firearms commander after the explosion.
Operation Plato, a pre-arranged terrorist plan, was declared within minutes after the attack but fire and ambulance services were not alerted.
Mr Thompson told an inquiry “something went wrong” with the joint response.
Twenty-two people were killed and hundreds more were injured after Salman Abedi detonated a homemade device at the end of an Ariana Grande concert at Manchester Arena on 22 May 2017.