All of the main voice cast are British; Molag Bal, Queen Ayrenn, Prophet, King Emeric, Abnur Tharn and Cadwell, with the exception of Lyris, who's voice acted by the popular and talented Canadian voice actress; Jennifer Hale.
It's common for some reason to use British actors in medieval games and films, probably because most people associate us with that period. I mean, we still have castles dotted about the country and a monarchy. I guess it's one of the reasons Game of Thrones is so popular. What I don't like is when they use British actors in order to depict medieval characters in places like Persia or Greece; in films like Alexander, 300 and Prince of Persia. I mean, they even made American actor Jake Gyllenhaal put on a pseudo English accent for the film. It's some-what silly; and King Leonidas! The Spartan King from.. Scottland?
Just a funny observation of mine.