Nope it wouldnt be with shipping and custom charges the other problem is and the one reason especially in the UK that I would warn against even attempting this is Nikon UK due to EU rules has to offer a 2 year warranty if you buy stock from outside the EU Nikon has to only offer the standard one year warranty and in the UK it makes certain that you know it
I don't think from the wording here that the 2 year warranty has anything to do with the EU. "As this is a Nikon UK & Republic of Ireland initiative it is only supported by authorised UK & Republic of Ireland repair facilities."
Also, from this page, "This applies to Digital equipment (digital SLRs, COOLPIX compacts & Coolscan film scanners)."
... "Nikon digital products sold outside Europe also have localised warranties and are not supported in Europe."
In other words, there's no UK warranty on cameras purchased in the US. Unlike Nikon USA, Nikon Europe will work on cameras from other regions, but only at a price.