An excellent classic British horror thriller..
A very interesting film. Frightening and original. It certainly got to me when I first saw it whilst still young.
The music is great (by a young Wil Malone who later worked with amongst others, The Verve, Massive Attack and Black Sabbath!) especially the sleezy opening title music.
All in all a typical 70's British horror thriller, but original as far as the storyline goes and well acted. Recommended.