Where was Dead Man's Folly filmed?

1986 television film directed by Clive Donner

Dead Man's Folly (1986) was filmed in London, River Thames, Buckingham Palace, Palace of Westminster, Harrods, Maidenhead and 2 more places, 8 places named in its Wikipedia article, in the United Kingdom. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

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