I realize the process is probably different for every show and every director, but just some generals would be really helpful. Also, the story is set in modern times and its a medium budget family TV show. How many people would you expect to turn up to an audition, if most of the parts have been cast, a few dozen? A hundred? A few hundred?
And for any Brits, is there a specific place where things like auditions happen in England (like English Hollywood)? I just assumed London, but I could be totally wrong. If London, in what area?
I already tried searching things about casting, but all I'm getting is the casting to particular shows, speculation about future casting and unhelpful things like that.