Millie's Flat in Uncustomed Goods
Is there any indication of what part of London Millie's flat is in? It's obviously a more commodious place than the one we see her in in the first season, and she no doubt moved into it when she went from waitress to translator. However, the neighborhood looks rather working class and the building itself looks grubby and more like a post office or police station than an apartment building (as opposed to Lizzy and Alice's more elegant building).
I would have thought Millie would live somewhere more fashionable, whether bohemian or ritzy.