Depends how old you are I think. I'm 19 and I have an escort van (1.8d n/a) and a focus (2.0) and they both cost me 1200 quid to insure. I never use the van for work, just SDP+commuting and my insurance is adjusted as such.
Generally for younger drivers I've found it is much more expensive to insure a van. Also Pass Plus doesn't seem to make any odds when insuring a van.