Whitehall

Whitehall was a road in Westminster. Sherlock Holmes and John Watson walked along it on their way to their lodgings at Baker Street. (PROSE: All-Consuming Fire)

In the 1960s, a secret bunker was built under Whitehall. This was later used by members of Operation Golden Age as their base. (TV: Invasion of the Dinosaurs)

A number of government offices were located there, including that of the Home Secretary. (PROSE: The Dying Days)