It looks like the Samsung UK store is run through Expansys. I checked my order through the Expansys order tracking and it's showing as 'Shipped', although the Samsung order status page says 'awaiting stock'.
If anyone has ordered through the UK Samsung store, get your order number and e-mail address you used to purchase from and put it in the Expansys order tracker.
Let me know what it says for you. Tried calling Samsung Support this morning but of course I've been in a queue for 10 minutes, which is to be expected at such a busy time for them.