Which part of London do you live in?
If that question is addressed to me - I live in the little-known London borough of Reading, as per my sig.
Personally, having worked all my life in the aviation industry, I rarely notice aircraft noise, apart from early mornings on easterlies, but I'm prepared to accept that a lot of people do.
My point was simply that it's generally accepted that noise nuisance has two components: how much noise aircraft make, and how often they make it.
Those are, after all, the parameters that go into the computation of the published noise contour maps.