Quem faz parte do Reino Unido?

UNITED KINGDOM: England, Scotland, Northern Ireland and Wales.
Elizabeth II is their Queen.

GREAT BRITAIN: England, Scotland and Wales.

Republic of Ireland (in the South) does not take part by any denomination above.
It is independent. THE UNION JACK is the popular name for the flag of the United Kingdom. The word “jack” is a word, which sailors use for a flag. It has been the British flag since 1603 when Scotland and England joined. The design contains the red cross of England, and Scotland’s white diagonal cross on a blue background. When Ireland joined the United Kingdom in 1801, its red diagonal cross was also added. The national flag of Wales is a red dragon, but it is not used on the Union Jack because Wales is a “principality” of England, meaning that is a ruled by an English prince.