The Crown filmed at Woodchester Mansion, Woodchester. Only the front of this unfinished mansion was filmed, standing in for a Scottish public school. On screen it's Gordonstoun.
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 Woodchester and it tells you what was shot around you, how to get there, and whether you can actually go in.
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