the UK n
|initialism (United Kingdom)||Vereinigtes Königreich En|
|How long have you lived in the UK?|
Sentence translation: Wie lange leben Sie schon im Vereinigten Königreich? (formal speech)
I would argue that "UK" is sometimes used as an abbreviation of "Vereinigtes Königreich" in the more contemporary, English-influenced German spoken by younger people, but it remains less common than the latter from what I can tell. Perhaps it's worth looking into.