I really don't see how a throwing around 25 L containers willy-nilly can prove anything............
Seriously, thousands of trades use vans every day, they are designed to carry certain weights (be it a palette of bricks, office equipment, etc) I don't think any of these trades are using the Ionics Thatcham tested bolts, do you? Just take an ice cream van for example, the weight of a fully loaded freezer must be at least a few hundred kilograms. How are they strapped down?
It really is just scaremainering, just like the ladder ban, to get you to buy their systems.