This is just a list of films in the horror section and a few more I'd consider "horror" from the other sections of Netflix (UK), as it's been my mission to get through every single one they post there. Sigh. At least it isn't as much of a shambolic mess as Amazon Prime at the moment, Christ.
The ones i've yet to see are likely the crappiest ones that no human being should be subjected to and i'm putting off as long as possible. Will try to keep it updated monthly.
(P.S. This is going to be a harder task than I first anticipated...)