Terence Stamp and John Hurt
Quite a casting coup for such a minor production.
"I'll book you. I'll book you on something. I'll find something in the book to book you on."
That may infact me remarkable indeed, but when you consider that Sean Connery was hired for a grand total of 6 days to record the voice of Draco The Dragon for Dragonheart, one realises that hiring named actors for voice work isn't that expensive.
Having said that, having Hurt voice the intro to the film was brilliant. I imagine Hurt himlself playing the part of 'Malcador The Sigillite' from the Horus Heresy saga.