Ok..... Next problem on my van i have to deal with

[Havoc99]

Ok..... Next problem on my van i have to deal with
The list of problems i have is actually getting shorter !!!!

Changing gear and the clutch seem fine in all gears whilst moving forwards.
In reverse though there is juddering.
This can be cured by using higher revs, but when normally reversing at normal revs at slow speed the van & clutch judder as you are moving from stationary to going backwards.
2004 LWB transit minibus
85,000 miles
Probably the original clutch, although not 100% sure on that

Advice appreciated.
Thanks