Trivia

Ciarán Foy got the idea for the story from an incident where he was attacked by a gang of kids at age eighteen.

Aneurin Barnard met several people with agoraphobia as research for his role as Tommy.

Two twin baby boys were used to play Elsa.

The whole film was shot with a hand-held camera.

The opening scenes were shot in Govan, Glasgow. The high-rise flats shown in the opening scenes have since been demolished.