。
From any angle, she's an English lady.
Literal
She [topic-は] from-anywhere look-even, England [genitive-の] lady is.
イギリス comes from Portuguese 'Inglês' — the Iberian explorers' word for English-speakers got pinned onto the country itself in Japanese. 淑女 ('lady') is a literary, almost old-fashioned word for a refined woman, conveying the kind of decorum stereotypically associated with British upper-class manners. The combination イギリスの淑女 leans into a slightly cinematic, idealized image rather than describing a typical Briton.