Civilian Air Raid Precautions (ARP) wardens were deployed to ensure that blackout rules were followed. These wardens patrolled at night and took action against any building or vehicle with visible ...

And that’s why the ARP [Air Raid Precautions] were there. When the worst did happen, however occasionally, the ARP didn’t have much experience to draw on.

During the ARP practice, sirens would sound the “alert” and the “all clear”, and during the “alert” period, a “total blackout” was enforced by the local authorities.