(BBC) A police commander who took control after the Manchester Arena attack has described his frustration at being unable to contact emergency services.
British Transport Police (BTP) Insp Ben Dawson was based in a London control room on the night of the explosion.
Insp Dawson said the control room could not contact other police and ambulance services and his team had to ring 999 and wait in a queue with the public.
He told an inquiry the first hour after the bombing was “absolute chaos.”
BTP officers were the first emergency responders at the scene after Salman Abedi detonated a device at the end of an Ariana Grande concert on 22 May 2017.