The 145 wouldn't land in those tight spots 'cos it's VTOL specs are ify. Plus it's bigger than the MD and EC135.
Also a piece of: "shop frontage????" would worry me if it started dancing with the MRB's never mind the TRB's!!!!
Anyway, I digress. What I have difficulty accepting is that the CAA allows a helicopter unlimited access to any busy street in the City?????
Using HEMS Jar Ops App1 to 3.005(d) (c). (2). (c). must by definition seriously minimise the choice of landing sites every time [dimensions from nearest obs being atleast 2D (daytime)].
Your 20' analogy Dr atkins is therefore unacceptable.
Anyone who cared to do an RA of this operation into some of these tight streets would deem it unacceptable in this day and age.
