We use Schmitz Cargobull Euroliners with ally side boards and XL curtains. XL curtains are load bearing curtains.
We also use shoring boards. These are telescopic ally boards with a clamp on each end.
You put them against the rear most pallet and clamp them onto your side boards. They are also certified load bearing and prevent rearward movement.
You can also put them across the front of fairly light tall stuff if you’ve got short stuff in front, to stop the tall stuff toppling forwards.
I don’t know where the boss gets them from, but I think it’s either Schmitz or whoever we get our trailers through.
Our trailers are on a 3 year lease and we get a pair of new shoring boards with every new trailer.
They aren’t cheap, 2 - 300 quid each, but the amount of grief and hassle they save us makes them very worthwhile. You just clip them on and go. The German Police, BAG, VOSA and everyone else who is authorised to make our life difficult see these things and go away happy.
Obviously there are things, like IBCs of ADR (or any other ADR stuff frankly) which needs to be strapped, but general haulage, like wine, these things are perfect.