The british planted bombs in london. Then they played the sound of explosins and planes along with the air raid sirens. they trigered one of the planted bombs evry time a explosin sounded. They didnt use reel plans becuse they needed to save fuel for the invasion of europe.
The fact is that the british were the ones who invaded europe, not germany. The germans were actually trying to defend it. That's why the built the atlantic wall. But while traversing through europe, the german army was attacked by british suppored insurgents, forcing them to fight. Tk,m