Shoreham (UK Parliament constituency) in  and various related categories in that tree such as Category:Rotten boroughs (mentioned below, I hadn't realised there was an "official" thread)
 could do with knocking down into counties/NI - there seems to be a fair few articles from the North lurking there.  Presumably you could adapt your UK county-finding code? We already have  and the Six Counties in the form  etc - XXX in Belfast seems to be a distinct special case that you'd have to handle.  South of the border there aren't any county cats established yet, but just knocking the Dublin ones down to a subcat would help.  82.20.52.30