A line of lights, too fast and bright to be Starlink.

At first I thought it was a bright satellite. Like ISS bright. Then another came behind it. After that one three more. See the attached pic for an approximation. The first one was a bit ahead of the other four. The trailing four were equally spaced apart. I loaded Stellarium to see what satellites they were but there was nothing at that particular time. So either I saw new sats go over that I've never seen before (highly unlikely), or I saw something else. There was no sound from aircraft engines. This was not a Starlink chain. They were too large, too fast, only 5 of them, and the distance from the first to last covered too much of the sky.