Brief Encounter
Well, it's no Notorious.
Sorry, but Little Children is not even in the same strata as Brief Encounter. And I must say that your criticism of the narration in Brief Encounter loses all relevance when you say that Little Children is better. Little Children has one of the most annoying and distracting narration tracks in the history of film.
The narration in Brief Encounter is really, really bad though. It tells you exactly what is happening on screen, over and over again, I don't need that. I found Brief Encounter to be a well made film, it's quite good, but it's held back because it tries to cast its two leads as sympathetic, but they really aren't, they are pretty darn terrible and I couldn't get past that.