I'm sure it's probably been said in this thread, but...
Larian is a european company. If you need english voice acting, the closest source is actually england.
So Dulany, if that is the true reason, why do you feel that the english voice actors are incapable of doing different accents?
And before you answer, please explain how the voice of Astarion (the most british voice to exist ever), was hired and paid money to do a
Russian accent for a Resident Evil game.