Slough House, then—a name which appears on no official documentation, nameplate or headed notepaper; no utility bill or deed of leasehold; no business card or phone book or estate agent’s listing; which is not this building’s name at all, in any but the most colloquial of senses—is evidently run from the top down, though judging by the uniformly miserable decor, the hierarchy is of a restricted character. You’re either at the top or you’re not. And only Jackson Lamb is at the top.
— Slow Horses (Mick Herron), Loc. 267-70