The Descent Part 1

The Descent is a British horror film written and directed by Neil Marshall. The film follows six women who, having entered an unmapped cave system, become trapped, and are hunted by subterranean flesh-eating humanoids.

The film's key cast and crew were all British as was its financing. It was written & directed by Neil Marshall (a British director, editor and screenwriter), it was filmed entirely in the UK (even though it was set in North America), the cast & crew is predominately British, the main production company is Celador Films which is a UK company, and the Producer was Christian Colson (another Brit).