The score early in the episode includes the song Bela Lugosi's Dead by Bauhaus. Norrie also has a Bauhaus poster hung by her bed that can be seen when Lucy enters the room and in wide shots of the two girls on the bed.
Lockwood tells George that the world has gone mad and that they understand this, that it it is their USP. USP is a marketing term meaning a unique selling proposition, something that distinguishes your product or service from everyone else's.