On the subject of "fake": The cartridges come in a printed with the manufacturer logo 9-box, with no foil packaging - just in a "Frustration-Free Packaging". Cartridges and content agree mE match the standard welded. The (superfluous and certainly not health-promoting) "fragrance" is inherently weaker because they're just not sealed.
On the subject of price and UK: I've just ordered in UK, for 20% less than in D with Prime, despite applicable shipping costs. The delivery took place anyway within 24 hours from stock in Germany.