Oops, hit "post" before I finished my thought.
The other thing I notice is that aside from the kitchens, the Household Corridor is the only BP space I've ever seen photographed that has painted walls instead of wallpaper (or silk wall panels as in the State or Royal suites).
After watching the television series The Monarchy (recently broadcast here in the States), I am even MORE interested than before in the non- State /Royal areas of the palaces. That series showed the kitchens, the wine cellar, and a Footman's room (where a footman was polishing his shoes). One scene also showed somebody in the Central Chancellry Office at St. James poking through storage cabinets of OBEs, OMs, etc. in preparation for an Investiture. But would love to see pictures of a staff bedroom, the office areas, or the workshops where the various staff tend to their duties. That would help give a flavor of what the real operation of the Court is like.