In the midst of a quiet Camberley afternoon a quite loud inbound aircraft noise prompted me to pop outside to see a w/b twin disappearing behind the trees as it turned onto base leg for LHR easterlies. Checked it out on FR24 and the origin of the 767-300 was given as Luanda Angola , just ahead of it and on final approach was another 767 of Air Rwanda from Brussels . What we could be importing from Luanda except dirty money I cannot imagine. one would almost have to go back to the 60s to see the number of unusual airlines at todays slot constrained LHR where there is barely room for anything not already scheduled.