Sound

Diagetic sound: Is the sound that can be heard by the characters withing the scene

Non- Diagetic sound: Is the sound only heard by the audience- the narration/ soundtrack

League of Gentlemen Apocalypse Introduction plays with the rules of diagetic and non diagetic sound. At first it sounds like a non diagetic sound- the soundtrack but in fact you find out that it is the ring tone to the characters phone so it is in fact a diagetic sound.

Score: Is the musical component of the soundtrack, usually composed specifically for the scene.

Narration: A voice telling the story as it goes. This can be used both alongside and instead of dialogue within the scene.

League of Gentlemen series 1 episode 1 plays with the rules of narration. At first you think that it is a narration of the letter that the character is reading from some family member when in fact it is an old lady reading the letter over his shoulder aloud.
This play on the usual concepts of narration and diagetic sound give the programme a twist and make it stand out compared to others.