Don't they usually hire a translating company to write the translated/dub script and then hire/use voice actors they have contracts with? At least that's how I believe the Dutch dubbing of cartoons and such go. They also have to sync and such. Dubbing is not that simple of business. I know of a Dutch company, Wim Pel Productions, that does a lot of shows.
I can actually already imagine some VAs in my head. The same ones that pop up everywhere

I'm gonna watch it in English regardless but a dub would be good news since it helps spread WSD to more people. Is there a chance it could be broadcast on tv besides the BBC or does Netflix not allow that?
(I'm suddenly glad my parents have Netflix. I can ask them if I can watch it^^)