I happened to be searching livejournal for a UK politics community because I seem to be obsessed by it at the moment. Found
uk_lolitics . As the name suggests it is a bit of an irreverent look at UK politics.
While browsing the various entries stumbled across a link for the
lolitics anonymous fic meme After (accidentially) clicking the link I discovered that one pairing appears to be extremely popular. They have been open about a week or so and seem to have over 600 comments. Who knew that UK Political RPF was so popular?