the only thing about towing with a van is the kerb weight can be quite low and you feel like the ass end of the van is wobbly and light. To be safe you should tow about 85% of your kerb weight (ie the weight of your towing vehicle) so if you towing vehicle is 2tonne you can safely pull 1700kg. if you tow over that and have an accident you can be charged for dangerous driving even if your maximum tow weight is more than that. (considered to be an unsafe load) so i've been told by a copper!
If you tow vehicle is lighter you run in to handling problems. i tow with a range rover now and when i have two big horses (16.2 heavy hunters) i feel i'm on the limit of the cars towing capability. i wouldn't like to take them and tow with a van.
look at your vans weight and see what 85% comes out as
also, if you ARE adhering to the 85% recommendation, (which i do, just by choice ) if the van has the same towing capacity as mine for example, 2 tonnes, you dont base the 85% on that, you base the 85% on the weight you are actually towing and the kerb weight, which on mine is around 1799kg if i remember rightly.(not sure if you were just using 2tonnes as an example kerb weight or specifically referring to mine). Anyway, means with the unladen weight of my trailer and 1 horse Im probably just within it... and i never feel like the back end is light, ive heard pick ups can feel like that tho.
I never said it was law sweet hart it's the advise i was give by a copper off the record, if you cause a serious accident then they haul you in for anything. My range rover is by no means posh being over 10 years old! and i've towed with everything from a l200 pickup , nissan d pickup, defender, discovery,transits, traffics, tractors and combines. many years working on farms and for contractors saw me towing with many vehicles oh including a quad! . and beleive me i don't stick to my kerb weight either. i've recently towed wellover my RR tow weight of 3.5 tonne and my trailers wheels looked a little stressed!
I picked 2 tonnes out of my head sorry ! not using you as an example. don't get so defensive. thought it was about giving your own opinion. and mine was my prefered towing vehicle is my range rover
Tow with what you like!! as long as you're happy.