Can't help thinking it'd be better to leave the god out of it. Are there no priesthoods in your setting? A god directly dealing with piffling PC adventurers doesn't seem right. (Or the PCs starting as significant leaders/heroes would be odd, too). But if you must, how about an avatar? That could be killed if the PCs took a dislike to it (as they will) - and yet the god can manifest again later in another one...
Britain has been infiltrated by soviet agents to the highest levels. They control the BBC, the main political party leaderships, NHS & local council executives, much of the police, most newspapers and the utility companies. Of course the EU is theirs, through-and-through. And they are among us - a pervasive evil, like Stasi.