A good British sci-fi thriller that makes good use of tight spaces.

While the dialogue is tainted by a few panic-thriller platitudes, and it is clear first-time director Neil McEnery-West needs to work on coaxing the best from actors, this is a zippy, clean-cut work.

like [REC] or The Mist (both 2007) but without the monsters, as a beleaguered society turns on itself and destroys its own hope.

I found myself most captivated by Sheila Reid whose performance is simultaneously vulnerable, self-assured and immensely satisfying.