right below is the specs of a escort 75 van......

Gross Payload(Kg): 750
Gross Vehicle Weight(Kg): 1900
Kerb Weight(Kg): 1150
Towing Limit(Kg): 465
Tank(litres/gallons): 55/12.1


So the van weighing in at 1900kg doesnt leave 1600kg to tow as by manufacturer spec it can only tow a max of 465kg so is illegal to tow more...