We've just had a pergola installed in the garden, and it's a lovely thing. But two of the roof louvres on one side are now sticking (after just a few days), and the supplier's response (after asking all sorts of questions about had we moved it etc) was that they will supply new parts, and we'll have to fit them. The third party installer won't do the job without being paid, which the manufacturer is not prepared to do. And this third party provides no warranty to their work beyond the time of installation. If we do the job, our warranty is not affected, they say. Given that it was pretty expensive, I'm pretty unhappy with this. Whether there's a trading standards angle, I don't know.
So if you are thinking of getting a Hygge pergola, or using SGK Distribution, you might want to bear this in mind...