Here I am in the south of 86 (close to Adriers), minding my own business, when I become aware of a sound, just after 10am, becoming louder. It sounded like a large jet aircraft, but at close quarters - very bassy. The sound grew in volume for a good 4-5 minutes then gradually diminished. The sound was audible for about 12-15 minutes.
At its peak, it was very loud - certainly loud enough to drown out a conversation. The direction of the sound was difficult to make out but I’d guess it was somewhere to the north-west of me.
The really odd thing was that there was only one aircraft to be seen. That, according to my flight tracking software, was a Ryanair 737 about 10 miles away, and the noise was FAR too loud to have come from that.
Did anyone else hear it? @kirsteastevenson - I know you’re fairly close by?
Does anyone know what caused it?