Clutch judder?

[Pete]

The clutch on the van has started to judder when pulling away in 1st, And judders quite badly when reversing. Worn clutch? Heard somewhere it could be the gearbox mounts too but theres no other un-toward knocking I've noticed. Could this be connected to the fact the fanbelts also started to slip when the clutch is dipped? Or just coincidence I reckon :roll:

Any ideas on a fix 'cos its a royal PITA!

Cheers, Pete