Continuity mistake: In the opening scene, when the three girls are surrounded by the boys on bikes in the park, they are on a tree-lined path. The angle changes, and there are no trees beside the path. Additionally, the houses in the background are different from the previous angle.
Continuity mistake: In the final scene when Ray is shouting at Liam from the derelict building, in the third shot of Liam there is a different crowd of kids standing behind him from the first two shots, then in the fourth shot the original crowd of kids are back.
Continuity mistake: In the final scene when Justine and Chrissie arrive to break up the fight, Chrissie walks in front of the boys while holding her baby. A boy in a blue shirt is standing between Justine and Nick, but when the angle changes the boy in the blue shirt is now standing behind Justine and Nick, and the two boys that were standing between Ray and Richard have disappeared.