Avoiding the trappings of protagonist plots and overt controversy, Leigh instead opens a curtain to British life and lets the camera roll. In "Who's Who", we get a glimpse into the lives of three classes, all connected by their workplace at a brokerage house. At the top is a wealthy partner who busies himself cleaning up the messes of his idle rich clients. Then there's the educated middle class, too young to be given the reins yet ready to assume the mantle with their Received Pronunciation and distaste for their working class peers. At the bottom is the middle-aged codger who ironically worships the ground trodden by the peerage. His banal wife raises cats and bores everyone within earshot.
Like all Leigh films, the performances are almost wholesale improvisation. His talented coterie of actors are brilliant. You feel you are watching a documentary rather than a play. This film may prove trite or boring to those unfamiliar with Leigh, so I'd recommend watching "Naked", "Secrets and Lies" or "Career Girls" prior to more subtle bits like "Who's Who".