Ultraviolet - 1998 - 8/10

Outstanding six part series of secret government alliance of church and state ops.
Tight, clandestine battle against vampires engaged in finance manipulation, AIDS research, abortion clinics, biological warfare.
Especially dark series, matched with an intricate, intelligent script.
Creators admitted Ultraviolet was a one-off and they packed every idea they had into it.
With Jack Davenport and Susannah Harker (great-great-great granddaughter of actor Joseph Cunningham Harker, whose friend, Bram Stoker, used for Jonathan Harker). Also a young Idris Elba as the hard-assed Vaughan.
Definitely worth tracking down.