Carb, it hasn't been signed for, so the Royal Mail haven't delivered it yet.
However, that's actually a good thing - I had a bl**dy awful time when they delivered something to the wrong address and someone there signed for it and kept it. I got nothing, but as they had a signature it suddenly becomes "sombody else's problem" when you try and sort it out with the supplier or the Royal Mail. Fortunately free legal assitance was a bonus from my credit card company and they went in to action and sorted it quickly, but I know of people who have spent months fighting similar problems and have ended up with nothing...
Pythag - hope it gets sorted quickly. And enjoy it when it arrives