Paul
As I understand it A WFP system is installed in the vehicle. You therefore have 2 choices
Choice 1 insure with vehicle this would be covered based on age etc just like van,
Choice 2 Insure under your business policy this can be new for old.
The kit I work with for bin cleaning has to be built from scratch I therefore use option 2 but my broker would have gone either way,
I am with Central Insurance Services in Aberdeen and policy is with RSA.
I cant see why WFP should be any different
Cheers
George