The article title doesn't seem to follow a pattern with other article titles, though I can't find anything in the manual of style.
One article that I can find for a place that requires a second word to clarify it is Boston, Massachusetts. A comma seems sensible to me i.e. the article would be called one of the following:
Dover, United Kingdom
Please will an administrator consider this. Thanks.
Cruz 14:07, 15 November 2011 (EST)