Seems like a bystander made a judgement call on a 109 decending into Dunsfold, though he saw something he didnt lost sight of aircraft and called the authorities. Still, better that than him just ignoring his instincts. I am sure the captain appreciates things like this happening, rather than someone doing nothing.!!!!
Well done to bystander, and also to emergency services for action based on little information. Good to know they are there, even if it is a false alarm.
Glad it was that than something else though.!