Yes, that's all taken care of. Delivery is via courier (FedEx), so it goes nowhere near Royal Mail. Import duties are built into the prices you see on the website. In practice, it's just like ordering from RS or Farnell, and pretty much as quick (2-3 days). And they seem to have a lot of parts (that I'm interested in, at least) that I couldn't find from the big UK suppliers, so that's a win-win