And the Wikipedia article immediately goes on to detail refutations of that claim: > Winterbotham's claim has been rejected by other Ultra participants and by

And the Wikipedia article immediately goes on to detail refutations of that claim: > Winterbotham's claim has been rejected by other Ultra participants and by historians. They state that while Churchill was indeed aware that a major bombing raid would take place, no one knew what the target would be. [then follows three paragraphs of more detailed refutation]