Well you could call the CAA, Monday morning, file a CHIRP, get ATC to lodge an MOR, I assume everyone has the reg detail??
Few years ago a clown took out the fence on departing Glenforsa, and was last seen heading to Edinburgh with barbed wire, and a large post trailing behind the aeroplane
A PA28. Pilot well known.
So the story goes, the next morning, takes the blue and white tape off said aircraft, and flew it to another airfield for repairs. Totally astonishing.
He kept his licence. It truly amazes me that there are still individuals who put their own life, and others at risk by doing things that seem extraordinary when you witness it.
Nah, report him asap