The Caretaker takes place in West London and has three characters. These characters include two brothers, Mick and Ashton, and a homeless man named Mac Davies.
Mick owns the room and the building that the action takes place in and, as his brother's caretaker, seems educated and fairly well-off. As such, he speaks in a middle-class English accent. Occasionally, he will use some London colloquialisms. For example, he says, "Now don't get perky, son, don't get perky." For the most part, however, he doesn't use these kinds of phrases. His brother Ashton's dialect is very similar.
Mac Davies, however, speaks with more of a working-class dialect. For example, he generally uses the more regional "ain't" instead of "I haven't." Often, his sentences contain rhetorical questions and working-class speech patterns.
Nevertheless, all three characters speak in London dialects.