- England [r]: The largest and southernmost country in the United Kingdom, and location of the largest city and seat of government, London; population about 51,000,000. [e]
- Scotland [r]: A country that forms the northernmost part of the United Kingdom; population about 5,200,000. [e]
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- Wales [r]: A country of the United Kingdom that historically was considered a principality; population about 3,000,000. [e]
- Northern Ireland [r]: Part of the United Kingdom comprising six of the nine counties of the Irish province of Ulster; population about 1,800,000. [e]
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