Like a tin full of bottle-tops

Hi all,

GU TD4.2...

I'm getting a rattling/scraping noise intermittently coming from, I think, one or both of the rear wheels.

It seems to be set off by hitting a bump in the road, but not all bumps will set it off.

The noise will go away by itself - the time / distance it lasts is inconsistent.

The noise never seems to be present from a standing start.

My guess is that this is a brake pad wear warning - has anybody experienced something like this and able to confirm or deny?

Many Thanks

PGK