There have been rumblings for sometime now that City Airport wants to both increase the number of flights that it handles AND have them arrive and take off in various new directions.
That rumbling has now become a reality with its recent application for planning permission with Dulwich, Herne Hill & Brixton all on its overfly "hit list".
With more aircraft will come more aircraft noise, and although the airports claim that the aircraft are getting quieter (but not that much IMHO, and what is clear is that there are many, many more of them) what we really need to recognise is that we are very much closer to City Airport than to Heathrow airport (about half the distance) so that on average we can expect the aircraft approaching City airport will be at half the height. And if I rember my physics correctly that means that they will not be twice as noisy, but more like 4 times as noisy (inverse square law).
What can we do about it?
Sign the Change.org petition
Oppose the planning permission. Large numbers writing in really will have an impact. There is a sample letter at the link above.
Stopping it now is far, far easier than trying to stop it later, and scuppering the planning permision is about the only effective way.