Union Jack Flag of the United Kingdom

The official national flag of the United Kingdom, commonly known as the Union Jack, is displayed against a plain dark background. It features the red cross of St. George (England), bordered in white, superimposed on the white saltire of St. Andrew (Scotland), which is itself superimposed on the red saltire of St. Patrick (Northern Ireland), all set on a royal blue field. This iconic symbol represents the unity of the constituent countries of the UK.

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