ELondonPax (and Niknak's friend - PaddiWak, perhaps?) - were you living there before helicopters started using the route along the Thames c1955? If not, don't you think it's a bit rich to critise something that was there before you and the noise was a known issue?
Moderator - this thread may be better served by moving it to the Rotorheads forum? Lots of relevant people there