A dancing radio stops partying to transmit an announcement on fuel conservation in this WWII cartoon short

Ever wondered what the radio got up to when you left the room? Well, in WWII it apparently took a Fuel Flash - a short public information broadcast - to stop your wireless from grooving away to the latest tracks. Halas & Batchelor was a British animation studio that excelled at anthropomorphising everyday objects to deliver a serious message such as fuel saving in a concise and friendly manner.

Cartoon public information film. The wireless is interrupted for the 'flash', urging people to be sparing with coal by not using the poker, and never using the cooker for just one dish. Also, to switch off lights when not in the room.