The Union Jack or Union Flag is the national flag of the United Kingdom. While no law has been enacted making the Union Flag the national flag of the United Kingdom, it has become so through precedent
A portrait of a ship, with the Union Jack placed on a jackstaff at the ship's bow, 1637
Linlithgow Palace ceiling boss with conjoined flag design, c. 1617
Slezer's Edinburgh Castle c. 1693 depicting the Scottish Union flag
The Union Flag prepared by the College of Arms for the approval of George III.
The flag of Scotland is the national flag of Scotland, which consists of a white saltire over a blue field. The Saltire, rather than the Royal Standard of Scotland, is the correct flag for all private
Union Jack
…The red St George's Cross width is 1⁄5 of the flag's height with a 1⁄15 flag height fimbriation The white diagonal St Andrew's Cross width is 1⁄5 of the flag's height, visible on either side of the St Patrick's Cross in diagonals of 1⁄10 and 1⁄30 of the flag's height, respectively…
Arms of James V (1513–42)
Model of the Great Michael
Challenger 1 tank of the Royal Scots Dragoon Guards flying a Saltire from the whip antenna
Royal Navy Sea King Mk5 of HMS Gannet