In this edition of EMS One-Stop, Rob chats with Jason Killens, chief executive of the UK's Welsh Ambulance Service. During the London Bombings, Jason was the deputy director of operations for the London Ambulance Service and played a major part in the command and control of the response to the UK's first multi-site, simultaneous major incident. Jason describes training staff to deal with major incidents, the complexity of response to an 800 casualty incident across four separate locations. He also describes lessons identified and the inquiry that followed.