These lights were not a long spacex train of debris but they moved up to one another. Silent, high up.

As the lights slowly, almost hovered for a while, then neared us, crossing the sky. We watched them and marvelled (my wife was somewhat unnerved). They approached and then seperated the closer above Cornwall they reached; one by one, they reduced their lights becoming a very faint, barely noticeable I saw an orange glow. This happened as they respectively broke formation, as if, I assume was an exploration—I mean almost impossible to see, they were there in the dark. We had, before this turned all lights out to enjoy the star gazing; we are Midland's folk and our light pollution ruins such activities. I tried to find a decent iPhone for the ladies, recovered one. Sadly instead of the light embued celestial bodies, I captured faint dots, so comparibly anaemic, useless image. They are unidentified it doesn't have to be alien, if they were drones or space junk please let us know.