Also:
> Regulators in the UK have not published detailed results of official tests, but rejected claims of significant fraud.
If I remember correctly this was already the situation in Germany already decades ago. At least half of the honey on the German market was (to use the term from the present article) adulterated as EU investigations at the time showed. The investigators was even hidden camera footage with importers admitting they knew this was the case. Then a lot of lobbying money moved around between importers, distributors, and local authorities, and the honey kept flowing.
The labs that did the testing were good for far more delicate work so it wasn't a matter of precision and accuracy, more a matter of Germans loving their honey. Stopping the flow of cheap, even if adulterated honey from China and at the time I think also Ukraine would be a big hit to the industry's wallet. I bet all those involved just told themselves "sweet is sweet" and went about their profit making business.