Harry, I have lots of Panzerschiffe. All their ship models listed are single models, even destroyers. Panzerschiffe isn't good at response to email inquiries. I've had good luck ordering from them. It's very rare to get a wrong model or model which didn't have the resin set correctly, and the company will make it right. Panzerschiffe makes sturdy blocky models that are good for wargaming, even without putting any bases beneath them. A good painter who can lay down a thin precise layer of paint can make them look good.
However, why are you interested in ordering Panzerschiffe? If you're in Blighty, then the VAT and shipping makes them not such a good option. You've got local UK options in 1:3000 scale that look as good as the Panzerschiffe in 1:2400 scale.
But the best value for money now is the WTJ (War Times Journal) 3d printed plastic models, which can be printed in multiple scales. Those look better to me than most GHQ models, for less money. WTJ (one guy) is really great to deal with, and is responsive to email. Only drawback for you is that WTJ is also a US company. But the model quality is so high that it would probably be worth the VAT and shipping.