Stu B (and all)
I said more or less the same a bunch of pages back.
One thing nobody but me seems to have commented on is the (relatively) small hole in the roof about 20 ft or so south-east (I think) of the main impact hole. Unless the emergency services hacked that hole for access, it is an impact mark, and given the way the machine was facing it is the initial impact mark.
Now I have only done three helicopter accident investigations and I have never used my qualification in structural engineering before becoming a professional pilot, so is there anyone who can explain how that hole came about? Or am I misreading the video of the roof as seen when the aircraft was removed? Quite happy to be told that I am and I will revise my opinion of what happened here.