I've started getting a clatter / rattle from the rear end when driving over bumps. This has coincided with the car feeling 'floaty' on the motorway (used to feel absolutely planted). Also, as a test, I tried an emergency stop from 60 and was a bit shocked to feel the rear end of the car skew from left to right.
It's booked into the garage next week for a look but I was just wondering if you guys know of any possible causes? Could it be a problem with the rear roll bar?