This document discusses UK film certificates, ranging from U (suitable for all ages 4 and over), PG (general viewing but some scenes may not be suitable for young children and suitable for ages 8 and over), 12 (suitable for ages 12 and over and may upset younger viewers), 12A (same as 12 but under 12s can watch with an adult), and 15 (under 15s cannot watch even with an adult due to violence or strong language). The U certificate means a film is suitable for all people over 4, while the 15 rating signifies a film with violence or heavy language that under 15s cannot view.