IIRC they also flew him over their replicated setup, and got a very good answer when they asked him how many Luftwaffe aircrew bombed decoys – “None! No-one would dare go back and tell Goering they’d bombed a decoy!”

Haha! Though I believe the level of nocturnal navigation was such that few would have even realised it was a decoy.

Not dissing the Luftwaffe, it was just the only practical practice of the time to follow water features and lights to target and sometimes they were spectacularly incorrect.