The Union Jack is the national flag of the United Kingdom, combining the flags of England, Scotland, and Northern Ireland. It features a blue field with a red cross edged in white, representing England, and a diagonal red and white cross for Scotland. The design symbolizes the unity of these nations under one flag. The flag is often seen during national celebrations and events, such as Queen's Jubilee or British sporting events. It is a powerful symbol of British identity and heritage, recognized worldwide. The Union Jack also appears on various items, from clothing to souvenirs, showcasing its cultural significance.