Some 18/20 years ago I saw what I believe to be a Lancaster flying over Lisbon - the 4 engines and twin tail point to one - heading in the general direction of the Portela airport in a landing pattern. Also might be preparing to land at the small Alverca OGMA airstrip...
Does anyone know if it was a Lancaster and what was doing in Portugal? Maintenance at OGMA? Simple scale on a longer flight? I wonder...
possible, more likely it was a Shackleton - they were still in service with the RAF then and looked identical to a Lanc from the ground.