The boxes available in the UK are cheap and nasty. By far the best option is the Ozmert Plastik box made in Turkey, used widely in Europe and sold through UK honey suppliers pre-loaded with Hungarian acacia.
Here's
a picture of the Ozmert box (Hungarian in the neat Ozmert, UK honey not shown, but undoubtedly not) and
here.
We have to put up with
this sort of box, or
this, takeaway things which might be found at the back of a fridge storing leftovers for too long.
The Americans do
boxes properly but the shipping costs kills a deal. I contacted Bee Equipment a couple of years ago and suggested they import these boxes from the US (they had a Mann Lake link at the time) and though they took up the idea, what turned up (for a while) in the BE catalogue were Chinese copies embossed with Chinese writing, which was a weird decision given that Chinese honey has a poor reputation and we want to fill boxes with local honey.
A few years ago I emailed the production manager at Ozmert and he was helpful and willing to sell me boxes, but a shipping container was the minimum! I heard more recently of a UK source; might be Denrosa Apiaries, because Murray produced over 100 tons of heather honey last year and has the need.