Good morning HR,
The R44 you mention was purely down to P1 bad decision, the people were desparate to get back to the midlands, and as the Wx at EGNH can be totally different than say 15 miles away, even after a very experienced Senior CPL advised against flying , they still did, very sadly for them the rest as they say is history.
The thing is, the part of the hill that met them in the cloud was only another 30/40 ft high before they would have cleared it.
Very sad,
Bad decision on the ground can be fatal in the air!
Vfr