Maybe they should've labeled it 'for UK only' instead.
Because there's limited border checks, it's to stop non EU standard food being exported to Northern Ireland, and then on to the EU.
In Northern Ireland, names and symbols matter. It's smart to avoid "UK" being prominently displayed where possible.
Quite a lot of people spoke of both of these, loudly, between the vote and the implementation. Their concerns were not only ignored, they were derided for bring it up.
"It's in my luggage" isn't allowed any more, and many reporters conflate (in all kinds of ways) what you can do as a private individual with what is possible for export businesses: https://europa.eu/youreurope/citizens/travel/carry/meat-dair...