Popped out in the Mondeo earlier and had a horrible noise from the rear offside.

Thought it was stone trapped in the pads, whipped the wheel off to find the shim from the old pads trapped behind the dust cover and the disk.

I must have dropped it down there when I changed the pads a few weeks ago without noticing and it shifted today so it was rubbing on the disc.
Anyway, easy fix which is a relief as I'll be racking up some miles over the next few days.
