The series is British :

Why the series is British ?

"Tea Time with the Queen" is a quintessentially British series, as it takes place in a traditional English setting and showcases the country's cultural peculiarities. The characters, who are part of the British nobility, are obsessed with their social status and public image, which reflects the importance of social hierarchy in British culture. Tea is also a key element of the series, being an important daily ritual for the Fitzwilliam family, who regularly host social events around this iconic drink. Finally, the presence of Queen Elizabeth II in some episodes, playing herself, highlights the importance of the British monarchy in English culture and society. In summary, the cultural, historical, and social elements of England are present throughout the series, making "Tea Time with the Queen" an authentic and iconic British production.