[PzLdr]

To keep ENIGMA a secret, Churchill allowed the attack on Coventry to proceed without ordering any extra defensive measures by the RAF or Army AA, despite advance notice of the raid due to codebreaking.

[Homer_J_Simpson]

To keep ENIGMA a secret, Churchill allowed the attack on Coventry to proceed without ordering any extra defensive measures by the RAF or Army AA, despite advance notice of the raid due to codebreaking.

I searched the index of Churchill's memoirs for a mention of this detail. Didn't find any. When Churchill wrote them - 1946 or 47 I would guess - ENIGMA might still have been classified materaial. But still . . .

[Vanders9]

This is a charge that has been made numerous times, but I understand that the latest historical thought is that Churchill did not know Coventry was going to be attacked, or he may have known an attack was coming, but not that Coventry would be the target.

In any case, there was not much in the way of "extra defensive measures" that could have been taken. The RAF had no effective night fighters at that stage in the war and there was a chronic shortage of AA guns and especially searchlights.