Originally Posted by
Globaliser
Always quite fun to try to detect during approach the point at which the autopilot's been disconnected. Easier if you can see the ailerons.
If you are in or close to the front rows on a Airbus 319/20/21 the tell tale "Chirp" "Chirp" "Chirp" coming from the flight deck area is a good clue.
I generally find that coming into LHR with BA that this normally happens about 30 seconds before touchdown. I would expect that other factors could influence the timing of the A/P disconnect but, the above is just my experiences.
Regards,
G-BPED