One thing I find fascinating about this film is how the economics of the middle classes in London have changed. In 1920 Robert Newton has three teenage children (I think they're meant to be school age at the start of the film), a wife, a mother-in-law (with a small pension ?) and a sister (does she work?) all living with with him on his salary as the manager of a branch travel agency which one assumes isn't more than the equivalent of £30,000 or so, perhaps with commission. Try running that sort of household in Clapham (they must have a minimum of four bedrooms, even if the two single woman share a room) on that salary nowadays
