Landmarks & buildings
Foreign, Commonwealth and Development Office
Ministry of Foreign Affairs of the United Kingdom
Wikipedia names Foreign, Commonwealth and Development Office as where 1 film or series was filmed; its page links to the sentence that says so. Wikidata records no shoot here yet.

Filmed here, per Wikipedia
Wikipedia says these were filmed in Foreign, Commonwealth and Development Office. Each title’s page links to the sentence that says so.
The DiplomatThriller series2023–TVmaze
Filming locations nearby
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Landmarks & buildings
10 Downing Street
England · under 1 km
Headquarters of His Majesty's Government
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Streets & squares
Downing Street
England · under 1 km
Street in London, England
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Landmarks & buildings
Government Offices Great George Street
England · under 1 km
UK government office building situated in Westminster
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Streets & squares
Whitehall
England · under 1 km
Road in the City of Westminster, in central London
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Streets & squares
Horse Guards Parade
England · under 1 km
Square and parade ground in London
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Landmarks & buildings
One Great George Street
England · under 1 km
Building in Westminster, London