Flying spinning disc flew over our car

We were driving along the A635 on 26/12/22 Boxing Day night from Barnsley direction towards Doncaster. It was very quiet out and late at night (23.10). We (my wife who was driving and I) suddenly saw directly in front of us in the sky an object which appeared to be flying slowly towards us (East to West). It was fairly low in the sky, about 20 degrees or so. It was hard to make out what it was at first as it looked a bit hazy - it seemed to be mirroring what was around it so we could make out a vague outline but as we got closer it flew directly over the car so I got a good look at it. It was a flying disc, spinning at about 250rpm. There were no lights I could see but it was slightly illuminated somehow with the ambient light. It was a dull silver metal colour, smooth textured but shaped like a squashed beehive (dome in the middle and then stepped down to the edges). It wasn't very big. We think about 6ft wide. We didn't hear any noise. The drawings show my view of it as it came over the car. My wife thinks it was perhaps the same shape on the topside too as it came towards us but I can't say exactly so the drawings are the view I could definitely see from below.
It was only about 30ft off the ground as it flew over the car. We were driving about 50mph so it all happened very fast. My son looked out the back window to try to see it as it flew over us but it vanished and he couldn't see anything behind us.
It was a non residential area, just fields around, although there was one house near us at the side of the road. No people or traffic near us. It was an A road but it was very quiet out at the time of night.
We are aware it sounds ridiculous but it is what we saw - a flying saucer basically flew right over the car. We are really having a hard time figuring out what it could have been. We don't believe it was a drone. There just doesn't seem to be a rational explanation we can come up with.
I just wanted to let you know what we saw. I've ticked to be contacted if you need to but I can't really add any more information than this.