Flag of the United Kingdom

The flag of the United Kingdom, known as the Union Jack, combines elements from England, Scotland, and Ireland's flags. It features a dark blue background with a red cross of St. George (patron saint of England) edged with white, overlaid by a diagonal red cross of St. Patrick (patron saint of Ireland), bordered in white, and a diagonal white cross of St. Andrew (patron saint of Scotland). This design symbolizes the union of these nations. The flag's distinctive overlapping crosses create a complex, symmetrical pattern representing unity and cooperation among the constituent countries of the UK.