How about having a public awareness day somewhere in central london, Hyde Park (not sure if this is a big area or not where helos can be landed) where it is publicised to the general public, so they can come along and see what helicopters are all about. Include the Met Police, Fire dept, Virgin EMS, charter, ag operators, Air Harrods machines etc etc.
They do this in Los Angeles every few months and literally thousands of people turn up and it has really improved the way helicopters are looked upon. They get great attendance and its a perfect opportunity to educate people.
It wouldnt be that hard to arrange and if you got between 10 and 20 helos there, which given the numbers around London, would be great day out for mum and the kids. Have the Police put on a simulated display, as could the Hems Explorer.
Anyway just a thought. It has worked in other countries and couldnt see why it wouldnt work over there.
AB