The Crown filmed at Hylands House, Chelmsford. This Essex stately home was dressed as the White House for a scene set in Washington. On screen it's The White House.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer.
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Venture keeps every scene location on one map, sorted by how far you'd have to walk. Open it in Chelmsford and it tells you what was shot around you, how to get there, and whether you can actually go in.
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