and squealing

Aston to the re-cycling as per normal.

Parking in tight formation too.

Then just as I got home there was a terrible squealing/scratching/metalic noise from the car. It sounded like I had run over something so I stopped and got out - twice. But I could not see anything.

I think it was a stone stuck between the brake disk and the back-plate. After a lot futile of investigations and a heart stopping drive of about a mile it cleared. Not sure if it had damaged the disk though...