Not all the time but sometimes when I am gently braking and occasionally when turning slowly I am getting a horrible metallic graunching noise. I've booked the car in but would appreciate any thoughts on the potential cause.
Bearing in mind what you just said make sure you haven't got anything 'stuck' in the wheel arches, like a branch. Or possibly a stone stuck between caliper and caliper water shield.
Tell us what it is when you find out, eccles - I get the same sort of noise sometimes, and it was hideous last week when someone was sitting in the back behind the driver.
I would say that if there is metal to metal noised whilst braking then your pads and your discs need replacing rather sooner than later for safety's sake.