My up! went through a phase a couple of months ago where during city centre driving everytime I went to stop it sounded like the brake pad had fallen off and the disc was rubbing against pure metal. It was a horrific noise. People were turning and looking! It's approaching 12 months old even though isn't only been on the road 7 months. Thankfully it hasn't done it since :/

 

Thanks for your reply. Mine does it when wet first thing in morning then after braking couple of times it stops. Anyone else?

 

I had horrendous squeeling from a front disc. Resolved by braking while reversing. Must have removed some debris.

 

Thanks Dash I'll give it a try.

 

I had horrendous squeeling from a front disc. Resolved by braking while reversing. Must have removed some debris.

I've had this happen to me TWICE now. (First encountered this on an A-reg Vauxhall Nova but never again on any car, until now) Grit/stone gets caught between disc and metal 'shield'. First time I took car to dealer; reversed and noise stopped. Second time, I just reversed; grit dropped out and noise went. I've also heard it on an up! driving past me.
NOTE! This is NOT to be confused with the 'grinding'/rubbing noise from overnight rust build-up after wet conditions, nor with other occasional and random noises I get from my brakes!

 

I must have had this debris the same as peter and dash. Cheers guys