In order to be allowed to go out and about towing a burger van, it should be compulsory to have a vehicle capable of accelerating at a reasonable pace and powerful enough to get up inclines without slowing to 35. They are fine on motorways, but you don’t want to get stuck behind a 1.6 focus towing even a small van on a country road.
I agree, and in the twenty five years of towing various new caravans, I have been known to overtake dawdlers on single carriageway 'A' roads with the van on the back. I should never be in that situation but some drivers are just too slow. Mrs YZ says "you're not seriously going past are you" as I select 'sport' or manually downshift, to which I reply "don't spare the horses, we're coming through".
It makes them look twice when they see over twenty five feet of caravan coming past.
I do honour the speed limit though (well, sort of) as I'm well aware that things can get messy really quick.