How long ago (in time and miles) was it last done? That'll help people tell you if it's overdue or not.

To me it partly depends on how long you expect to keep driving the car, and its ongoing value / costs (due to age, other things coming up like CV joins, gearbox noises, etc). If it's about due a change and you expect to be driving it 12k/year for another couple of years you'd be wise to get it done in that period, so do it now and get more worry free miles from the change .

On our somewhat car park damaged 2003 car that only does ~4k/year I let it slip longer than I would normally because I was thinking of getting rid of it and took the chance each time I went out even thought it was ~20% past limits on time and distance for change. But then decided to keep it running so had the belt & pump done ASAP.