The Crown filmed at Somerleyton Hall, Lowestoft. A 19th-century mansion in Suffolk stood in for the royals' Norfolk getaway. On screen it's Sandringham.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer.
Planning the trip? The United Kingdom travel atlas covers money, language and getting aroundand everything filmed in Lowestoft is on one page
Venture keeps every scene location on one map, sorted by how far you'd have to walk. Open it in Lowestoft and it tells you what was shot around you, how to get there, and whether you can actually go in.
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