I remember my mate asking me to stop his golf brakes from squealing. I took off the front wheel, to find a pad that had almost slid out of the caliper, it was so thin. And the disc (non vented) was like a meat slicer!
Often, mot testers look at brake discs, but with the wheel on... mine pointed out a (wear) lip, and I got an advise. I did them, but they were no where near as bad as those in this thread.
It's lucky you where 'interested' in the problem, as many, (non forum drivers) might just, 'wait until the service....'

gregdav wrote:

where we're they from pete?