The Crown filmed at Harefield Grove, Hillingdon. A 19th-century house in west London stood in for Diana's home after the separation. On screen it's Kensington Palace.
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 Hillingdon and it tells you what was shot around you, how to get there, and whether you can actually go in.
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