Out in my back yard with my dog, I heard an aeroplane overhead, looked up and saw the plane with a black dot above it to the rear of it

Out in my back yard with my dog, I heard an airplane overhead, looked up and saw the plane with a black dot above it to the rear of it, at first I thought it was a bird and then thought it was too high up to be a bird, the object then did a circle and headed off to the south for about 2 sec then stopped and went back to the east before doing a right angle turn towards the north before disappearing into a cloud bank