Same rule apply

Irvine Welsh's diabolically cool Filth is one of the best novels that I've read. There's not much amiss in the movie, it's quite a controversial scorcher on its own right, but it's a bit messy to be honest. And not to slander James McAvoy, but can't help it how this would have looked with someone like Ewan McGregor - another Scottish lad - in the lead.