Jekyll and Hyde: TV series, fantasy or horror?

I have seen two episodes so far and it looks very promising, if quite dark. It's not just about Jekyll and Hyde and it has a range of bizarre and quite gruesome creatures as nasty villains. London has a very down-at-heel feel about it which seems appropriate for the time. You almost expect Jack the Ripper to appear at any moment.

If you missed the first episode it's available here:
https://www.youtube.com/watch?v=UfiTBr_54K4