Hi mate,
In the same situation as you, need the van to survive.
We are lucky in a way as apparently its easier to get multiple drivers added on to van insurance. Lots of building companies commonly have about 10 workers on the multiple driver policies so it should not be a big deal.
after I lost my licence I found someone to drive for me. When I made the call to the insurance company they added him on to the policy . Obviously I am excluded from the policy but believe it or not as my new driver has no claims discount since 1980 they actually credited my credit card three pounds eighty five!.
Unbelievable I know.
I am with direct line.
Good luck mate when you make the call.