There seem to be quite a few retailers popping up with Jersey PO Box addresses. Powerplay Direct are another, who offer good prices for CDs too, but I know for a fact their shop is in Eastbourne, as I have visited it often! Loaded (aka Future Ent) are based in Kent, so I don't really think that having a Jersey PO Box address means that the actual company is based there. Perhaps someone can enlighten us? Who knows, perhaps even Play aren't actually in Jersey?!
Did a check on their domain names, none of the registration details seems to be related. The interesting one was loaded247.co.uk this domain name is hosted on the Futurent name servers, so this may have been Futurent.