Demons (bbc short series)
A London teenager Luke Rutherford, learns that he is the last descendant of the Van Helsing line by the sudden arrival of his American godfather Rupert Galvin. Luke is charged with the role of smiting the gathering dark forces of the world whilst trying to live an ordinary life of exams and parties. Rupert Galvin helps train Luke with the assistance of Mina Harker, a blind concert pianist and authority on half-lives (i.e., vampires, demons, zombies, and werewolves).
It's by the people that do Hex and Merlin. If you liked Neverwhere and stuff like that, I reccomend it.