Also, the other women look deliberately pitiful: staggering or swaying, still drunk, tattered, shoeless etc., whereas the Harvey Nicks woman is elegant, sociable, seen acknowledging the lower orders who could never afford to actually live at her address, merely deliver post to it.
I secretly rather hope the postie is saying "Don't start talking to me, love- last time you struck up conversation coked up to the eyeballs, you bored the shit out of me and made me late."