An excellent piece of work by Paddy Considine, especially for his feature directorial debut. Peter Mullan and Olivia Colman are both absolutely incredible in the leads, giving very raw and extremely strong performances. The story is bleak yet original and deeply emotional, and whilst parts are difficult to watch, this is the reason for its powerful effect. It may lack any kind of message but there is a deeply rooted sense of hope in that two damaged people can find such comfort in each other, which is what I think pulls you in so much.