EyeForFilmA German model gets herself inadvertently trapped in the bowels of a London Underground train station when she falls asleep on the platform and misses the last train for the night. When she awakens, she finds that she is not alone down there.... something is lurking in the tunnels.... something not very nice at all.
Claustrophobic, tense, gripping British horror movie from a first-time director, which is worth a look.

Director Christopher Smith provides an enthusiastic commentary track for the DVD.
This interview with him is an interesting read.

It's fair to say I have gone a bit over-the-top with the locations section here due to my life long fascination of the London Underground. Funny how you can take two locations and turn them into 30 screenshots from different angles!