On my 13 plate Up (37k) I was convinced that urban traffic bumps and rumbles were causing a rear suspension clunking noise. On this forum I see notes about shock absorber noise and looked for that. On higher miles VW threads I see comments about beam axle bushings. I turned the car into a good local garage and asked them to look and they found a worn front suspension drop link which has sorted out the problem. I was surprised that my firm belief that it was a rear end noise turned out to be as wrong as it possibly could be.