I think it was an aeroplane, but it looks like a star falling upwards. For some reason I always imagined falling stars to go mainly horizontal or left to right, but as I am writing this, I realize that does not make sense. Meteors will go down, but comets can travel in any direction ( I guess? Am I missing some basic physics here? I don't thinks so.) and this could be comet. But I don't think it is. I sat reading on the heath and when it got dark I saw this. Might use it for a futur project.
Sony V3, February 2019.