Didn't see the lights myself but the A38 near Bromsgrove has been a hotspot for this kind of thing for years, I've heard at least three accounts from people who lost chunks of time around that stretch of road. One bloke I did a vigil with back in 2019 swore he pulled into a layby at half ten and next thing it was gone 2am with no memory of anything in between.
What direction were the lights moving? That actually matters more than people think. Stationary or slow drift is one thing but if they were tracking the road that changes things considerably. Also whether you felt any physical effects afterwards - nausea, unusual thirst, skin sensitivity. These things get dismissed but they show up consistently in the accounts I've read.
Post everything you can remember while its still fresh. The details people think are irrelevant usually aren't.