Helicopters can land In anywhere in the London R160/UNL zone if they have 2 engines, so in the event of an engine failure, it wont be a crash or disaster, It will be a safe one engine powered landing.
The Helicopters that operate into this area are Normally, UKP251 (Police 251) and and HEL27 (Helimed).
The London Air Ambulance can land normal were it can fit in and out, It lands in various parks, many I have witnessed near Kings College Hospital (Ruskin Park) a few occasions and video evidence to prove it, they have landed in streets in the west end, Most recently near Kensington or the busy Piccadilly circus and Trafalgar Square.
I have also noticed, due the area I live in UKP251 going as low as the nearby local flats.
Quick Question on that for myself, how does radar pick the choppers up on radar, if its well below Radar SFC.
Regards,
R..