Honestly confused to how anyone can give this film a bad review?

Rating: 10/10 (19 April 2016)

I found this film after looking up best recent British films, maybe that's the issue, maybe there wasn't enough nudity and aliens for Hollywood "big screen" fans. Maybe I'm bias but the film I just watched had me far more gripped than any big Hollywood film of recent.
Felt tense and thrown in to the suspense, as well as being touched by the plot line and trying to imagine how horrific the events in the film would be if they were to happen. There were parts in which this was very potent, especially near the end, no spoilers intended.
Michael Caine played a role I could never see him suiting and he played it well. The two lead roles also pulled me further into the suspense, especially like how, again, Hollywood poison seemed so distant from this film in the respect that the lead role didn't even need to fire a single shot in this quite action packed film.
I read a review on here before watching that claimed that this film left things unexplained, and having just seen another current film in the cinema recently, I salute the makers of this film. It's like people have lost the use of their imagination and need to be spoon fed what to think, also don't take that as in this film leaves stones unturned, they are silly little things that lazy people can't be bothered to think about.
Great film
Worth watching.