"The warranty that comes with this particular item is : Seller's 12 months standard warranty and 12 months Hong Kong local warranty. United Kingdom, Australia Customers can even enjoy Local Service handled by our local agents. On top of that , we pay all the postage costs to have the item returned to us and returned back to you."
To me that says it has to go back to HK, and Nikon UK won't cover it under warranty.
