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Not yet. There was a chap on the news in the early hours who had been an RAF technician who thought it could have been some sort of engine failure, but although it seemed (he said) that the chopper may have fallen like a stone, there might have been some rotation in the rotors which gave the craft some drag which gave the pilot time to switch off some systems(don't remember exactly) but it prevented the chopper exploding and prevented a fire. The pub itself was once a tenement building which owing to a fire years ago the upper floors had been demolished leaving the ground floor only and the roof of which would not have been strong enough to bear the weight of the downed chopper. I can see the logic in this chap's thinking but it will be very interesting to find out exactly what happened so it couldn't happen again somewhere else.