The raid reached such a new and severe level of destruction that Joseph Goebbels later used the term coventriert ("coventried") when describing similar levels of destruction of other enemy towns. During the raid, the Germans dropped about 500 tonnes of high explosives, including 50 parachute air-mines, of which 20 were incendiary petroleum mines, and 36,000 incendiary bombs.
Rumors have swirled for decades that the UK Government knew about the bombing having just recently cracked the German codes, and let the bombing happen so as to not tip off the Germans
Or is the explanation far more mundane than the conspiracy theorists believe - that Mr Churchill and his advisors were just as much in the dark about the Germans' Operation Moonlight Sonata as the people who spent the night cowering in their shelters?