Wonder if anyone can advise on this. Im looking to get rid of car and get a van, now on compare the market site ive listed occupation as window cleaner and just with that insurance remains basically the same, £200 or so. Now, to be honest and list a fitted tank as a modification, I cant find anything in their list of mods which it could be. Also, from your experiences, would it be liable to go up a great deal or not too bad. my mates building van insurance is cheap, and I'd have thought with all those drills and junk flying about in an accident much more of a risk than a window cleaner. Advise much appreciated.