Union Jack Flag - Official Flag of the United Kingdom #3844677 (License: Personal Use)

The Union Jack is the de facto national flag of the United Kingdom, formed by superimposing the red cross of St George (England), the white saltire of St Andrew (Scotland), and the red saltire of St Patrick (Ireland). Its distinctive pattern reflects centuries of political union, with the current design adopted in 1801 after the Act of Union with Ireland. The flag is used officially on government buildings, during national events, and internationally to represent British identity.

This image is commonly used on government websites, educational resources, travel guides, and news articles about UK politics, history, or culture; it serves users seeking visual identification, symbolic meaning, or official representation of the UK.