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.

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.

Two twin baby boys were used to play Elsa.