There's some Anglophilia among certain parts of the population. They like to create a certain idea of Britishness, and like to associate themselves with that mental image, hoping it will make them appear sophisticated and slightly quirky in a way that makes them superior to the common rabble.
Feels hard to believe "Anglophilia" is the main reason people watch it, when it's all about making over-the-top fun -- way beyond Wodehouse, even -- of all the things those "Anglophiles" could be reasonably supposed to love.
