Leadenhall Market appears in the first film as part of Harry and Hagrid’s approach to Diagon Alley. Its richly roofed market passages provide the real-world streetscape for that movement into the wizarding quarter. The most specific detail is the blue doorway in Bull’s Head Passage, which represented the entrance to the Leaky Cauldron.

That precision matters because Leadenhall Market was not a complete Diagon Alley set. It supplied an approach and a particular doorway, not every street or interior associated with the fictional shopping district. Nor should it be confused with the later London locations used for the Leaky Cauldron exterior in other films.

Within the London cluster, Leadenhall is therefore the Place for a transitional screen moment: a real City market becoming the threshold to a fictional world. It differs from King’s Cross, which represents departure for Hogwarts, and from the Reptile House, which contains a specific interior scene. Choose it for the market architecture, the covered passages and the Bull’s Head Passage doorway, while keeping the filmed sequence’s limited scope in view.