Occurred on August, 2013 / Whitstable, UK
Info from Licensor: "This video shows the operation of British dual tone air raid siren. This siren is of the cold war era and was installed as part of the United Kingdom's Warning and Monitoring system. It would have been sounded in the event that the UK was attacked with nuclear weapons. The siren design and tone remains true to the original World War 2 sirens, recognized as used during the London Blitz. The video was taken to test its operation prior to restoration."