It seems like the charger is one of those "slide in the plug of choice" types, they might send you the right plug (when I bought a battery charger from US they sent European), or you might be able to acquire the right one, so you don't have an extra bulky plug (with adapter and all).
Ok, went to check... if it's a standard type of slide-in plug, I have a UK version right here, which I can send you by post, if you end up needing it.