Portable air raid siren being tested 1939
An official sounding of a portable air raid siren during tests in Parliament Square, London. During May 1939 siren tests had been carried out in most of the London Boroughs and wardens had been posted at various points in order to make audibility reports
Picture No
14121708
Media ID
48866509
Size
453px x 600px
(6.6MB)
Credit
© Illustrated London News Ltd. / Mary Evans
Source
Photograph in The Sphere', 13 May 1939, page 261
Date
May 1939
Pick your License
Alerting Alerts Hand-cranked Interwar Operated Portable Preparations Siren Sirens Sounding Stern Tests
Features In These Collections
> Contributors > ILN
