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Ghostly Swansea 'air raid siren' goes off in city bombed by the Nazis 75 years ago | Daily Mail Online
The haunting history of the air-raid siren | National Geographic
Primary History KS2: WW2 Clips. An air-raid siren sounds the warning - BBC Teach
Chrysler Air-Raid Siren - Wikipedia
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The haunting history of the air-raid siren | National Geographic
Primary History KS2: WW2 Clips. An air-raid siren sounds the 'all clear' - BBC Teach
Really Loud Portable Air Raid Siren Test - YouTube
Civil defense siren - Wikipedia
Historic England: Air raid siren and mill among 2022 listings - BBC News