Worn Rear Bushing

Hi all

Have an Octavia. After a routine service (car nearly 9 years old, about 100,000 in miles/ 160 000km) was told I had a worn large rear wishbone bushing. Was told it would probably be best to replace before next service (fixed mileage)

As yet I don't feel any effects from driving. Wonder should I get it done immediately or could it wait a while...also what effect exactly does such a worn bushing have on the car's performance...would it be a slow decline (more noise etc.) or a sudden problem arising?

Any advice appreciated