Looks like I am still missing something! The shaded red area on the proposed map is still both north and south of the Thames and I would have expected planes to use both routes in the interests of efficient arrivals. At the moment, I believe that most planes to City using the southern approach route over us anyway. Vectoring spreads them a little if they are busy in order to maintain separation, but this will be the case in the future as well. Lie many others, I'd rather have the intermittent noise of an overflying plane than the continual droan (or worse) of traffic on a busy road.
Andrewr,
I suspect you know a lot more about air traffic control than I do. but the difference between the maps is the black and red lines. The thing to notice (other than a red line going right over your house), is the black line that only goes round south london, rather than both north and south. This balck line represents 'where the majority of aircraft fly during normal operations and the red line is the published centre line of the route.'
This does suggest a significant increase in flights directly over Forest Hill, although figures are not currently available details which paths are used within the current boundaries. But I think a reasonable estimate is a doubling of possibly tripling of aircraft over Forest Hill. This is based on 20% increase in flights between now and 2014, all the flights that go over North London coming our way, and a narrowing of the vector spreads to focus on the red line.
We are lucky that we are talking about relatively quiet aircraft going into City rather than the Heathrow flight path, but these planes are much lower and the peak operation will be 20 flights per hour, or one every three minutes. Given they take about 1 minute to cover the sky overhead we may be subjected to noise for 1 out of every 3 minutes during peak operating times.
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