I do get slightly annoyed when the otherwise adorable Dowager Duchess's response to Peter handing on the tickets to Miss Climpson for the tubercular couple in 'reduced circumstances' is to wonder how one reduces one's circumstances. I get that her malapropisms and confusions about poorer people (like what tailor she should recommend to Harriet as she has no idea what a novelist might earn) are part of her charm, but it is a very usual expression, certainly for that time period, and fairly self-evident..?
I've vaguely assumed, though, that the 'reduced circumstances' imply that the couple in question have fallen on hard times because of his illness, and therefore possibly have the requisite clothes/savoir-faire for a rather grand European holiday from their more prosperous past?
Especially as the context is the Dowager Duchess's attempts to understand the finances/issues/temperament of a middle-class rural doctor's daughter who is a well-known novelist marrying into the aristocracy.
I've never read the JPW sequels, but I am always a bit faced by the DD casually saying that P and H will need eight servants in their London house, along with Bunter and a capable housekeeper.
I could see, I suppose, a cook and a parlour maid, but ten servants for two people in the 1930s, when one of them has just been living solo in a flat with presumably a cleaner/charwoman! Would Harriet who likes clothes, but is not unduly concerned with her appearance even want a lady's maid, apart from it meaning Bunter doesn't have to pack her pants every time they travel?