I think Martin is right. My source should be taking the dates as different attacks. Even one attack the same night can be considered that the attack happened in two different days...

Actually, it was only TWO He-111 the ones which got lost in the British fog and after one hour without finding their mates nor finding where they were, they decided to low the weight of the planes and went back home... What they didn't know is that they low the weight of the planes ON London...

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