MY view - as someone talking to aircraft over London:
The ENG a/c and it's new sister ship probably (assuming we are talking about the same Denham based operator) SHOULD be allowed over the Specified Area (sorry - I meant EGR160) simply on probability/reliability alone.
How many R44s fall out of the sky into non built up areas.... IN THE WHOLE WORLD?
If the Organisation is "deemed" professional enough then why not.
IT IS NOT ILLEGAL TO FLY IN A C150 from Banstead direct to Alexandra Palace so why not a helicopter????