In message , at 15:22:08 on Fri, 4
Nov 2011, Graeme Wall remarked:
What's important here is how far west of Heathrow they get, so we can
compare how far west of the estuary airport the planes might turn.

It's not strictly comparable, you just don't turn onto a parallel track
55kms east of the LHR track.

Five out of seven of the Heathrow flightpaths that were posted here (as
pdfs) earlier today make quite tight turns to head north and south. Two
of them head for Woodley (aka Reading suburb).

There's no reason to suppose that flightpaths from an estuary airport
would be routed over central London at all.
--
Roland Perry