Mmmmmmm beer!
This is my area of expertise; currently HM Customs would not be the least bit interested in anything less than 110 litres of beer - per person.
Let's work this out: German beer could well be in 0.5l bottles so that's 220 bottles with 20 bottles per crate that equates to 11 crates per person. Supposing a crew of four over for a weekend jolly that would obviously work out at 44 crates, quite possibly requiring an underslung load!
So Mr Plod, keep your neb out of what you don't understand.
