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The first flags of Great Britain were hence flown during the rule of James I and Charles I during 1603-1649. In 1606, it was decreed by a royal proclamation by James I, that a single flag would be used to represent the whole United Kingdom. The Scottish and the English crowns were united on March 24, 1603, when James VI of Scotland became the King of Britain and was renamed James I. The flag has a width-to-length proportion ratio of 1:2. Andrew's Cross of Scotland (the diagonal white cross on the blue field), and Saint Patrick’s Cross of Ireland (diagonal x-shaped red saltire). George's Cross of England (the centered red cross bordered in white) St.
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In short, the Union Flag is a composite of St. This is superimposed on the diagonal white cross on the blue background which is again further superimposed on the diagonal x-shaped red saltire. The National Flag of the United Kingdom (Union Jack) features a blue background with the centered red cross edged in white. The National Flag of the United Kingdom was officially adopted on January 1, 1801.
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