However, he claimed the corporation would not commission a relatively unknown actor.

These characters - all played by relatively unknown actors - will fetch up together and try to save the world from impending disaster.

And they cast local, mainly unknown actors who could speak the broad regional dialect.

Using a mockumentary approach, the film entwines fictional 'found footage' starring unknown actors around genuine shakycam recordings made by members of the public during real power cuts.

But no one would agree to do it - so they had to use unknown actors instead.