UK Flag - Official Union Jack Symbol of the United Kingdom #154730 (License: Personal Use)

The Union Jack is the de facto national flag of the United Kingdom, formed by superimposing the red cross of Saint George (England), the white saltire of Saint Andrew (Scotland), and the red saltire of Saint Patrick (Ireland). First adopted in 1801 after the Acts of Union, it remains a globally recognized symbol of British identity, sovereignty, and heritage. Its precise proportions and color specifications are legally defined for official use.

This image is commonly used on government websites, educational resources, travel guides, and international event pages to represent the UK. It serves users seeking national symbolism, historical context, or visual identification for official or cultural purposes.