|Flag of the United Kingdom|
|Adopted||January 1, 1801|
The flag of the United Kingdom, often called the Union Jack (although officially called the Union Flag) or the Royal Union in Canada, consists of the Cross of St. George of England edged in white, superimposed on the diagonal red saltire of St. Patrick (patron saint of Ireland), which are superimposed on the satire of St. Andrew (patron saint of Scotland).
Comprising of symbols of each of the three kingdoms of the British Isles (Wales, being a principality, is not represented) the flag of the United Kingdom is meant to be a unifying flag for all of these kingdoms. The first Union Flag was made when king James VI of Scotland inherited the English throne and desired a flag that would represent all of his realm. This was achieved by superimposing the English cross of St. George on the Scottish cross of St. Andrew, creating the first Union Flag. When with the Act of Union of 1800 the Kingdom of Ireland was merged with the United Kingdom the cross of St. Patrick was added to symbolise this part of the kingdom and the Union Flag has remained unchanged since then.
The war flag of the United is the same design, but modified to fit the proportions of 3:5.
- The term "Union Jack" is often said to be only valid when used by the British Navy. 
- The army version of the flag has proportions of 3:5.
- The flag is not symmetrical, the diagonal lines would not join if they were extended.
- ↑ United Kingdom at Flags of the World
- ↑ ISBN 9025292909 Grote geïllustreerde vlaggengids by William Crampton (nl)