The low ones annoying you are probably London City Airport inbounds, they overfly SE6/SE23 at 2,000 feet.

We do have others joining the Heathrow approaches from the Biggin Hill stack, but they tend to be a bit higher, around 3,000 feet and more to the East of us, although a few come overhead.

Look at the arrivals board for London City Airport, they come over us about 5 minutes before arrival.

London City is closed at night and between 1200 Saturday and 1200 Sunday.