Sorry, I mean the rear passenger doors as you would have on the estate car (both estate and van have the same tailgate door)
Ins companies don't like the thought of a car bieng 'modified'. Windows could be fitted, correct seats, and belts, and all could be tested to be sure it was perfectly safe. I've seen these conversions, and you really have to look twice to see it used to be a van.....the usual comment is "look....a two door estate, havent seen one of those before! " Insurance companies just like to wash their hands of anything that is not original. If it could be re-classified via the log book, then they would never need to know it's former life as a van, but this is where those rear passenger doors come in, they can obviously never be there, as they we not there as part of the vans body shell.
If there was a fire in the car, there would be no means of escape, an obvious concern to the insurance. but in another sence, it would be no different to many of the two door coupe's like the sporty version of Yaris, or Honda Civic's...........
(It's frustrating really, I watched Scrapheap challenge last week, where they welded two mini's together, to make a kind of Limo, and they also put a 6ltr engine into a vauxhall carleton ---- all these weird cars passed the SVA and were road legal..........but I still can't put rear seats in a van !!!!!!!!!!
(P.S - new small vans can come with 'crew' seats in the rear -------GGGRRRRRRR !!!!!!!!)
Cheers - Paul