Transferring Van No claims bonus to Car no claims bonus

[Cromises]

In a nutshell:
Looking at getting a van for a MTB/day van project (as per my previous thread). However I have read on several sites that if you were to go from a van back to a car (which I would in the future) then the NCB you gained while in the van doesn't count towards a car policy? How true is this?

Also before I forget, i'll own the van, use it for everything so it'll be my personal vehicle and not a company one driven by some ape.

[Desiderata]

I've swapped backwards and forwards between vans, pickups, and cars a few times. Insurance have said that they don't automatically transfer the NCB between car and commercial and vice versa but have always done it " as a courtesy".
Always been with the same insurer (Direct Line).

[Cromises]

Fair enough! I'll give mine (Aviva) a bel tomorrow and what they say!

Anyone else?

[DrDeAtH]

Desiderata said:

I've swapped backwards and forwards between vans, pickups, and cars a few times. Insurance have said that they don't automatically transfer the NCB between car and commercial and vice versa but have always done it " as a courtesy.

Similar experience, but with various providers over the past 25 years

[sociopath]

Some will swap and some won't, so worst case is you may have to take a policy for a year that isn't with a preferred insurer.