Did Radio Traffic Provide Warning of 8 AF Raids?

[Juha]

Hello boomerang
IIRC Germans took a heavy British radio traffic as a sure sign of fortcoming RAF night raid. Radios were essential to the bombers so they had to test. British probably knew that the testing gave up the fortcoming attack but I don't recall that they had, at least often, tried to fool Germans with false radio testing. Probably they calculated that the Germans anyway knew rather well BC procedures and conditions when the main attacks were launched.

Juha