Originally posted by Killearn Kitties
The flag of the United Kingdom
is made up of the flag of St Andrew, the Patron Saint of Scotland (diagonal white cross on a blue background), St George, Patron Saint of England (red cross on white background) and St Patrick, Patron Saint of Ireland (diagonal red cross on white background).
Just want to add this info about the Union flag to Karen's ..

The Union Flag, or Union Jack, is the national flag of the United Kingdom and it is so called because it embodies the emblems of the three countries united under one Sovereign - the kingdoms of England and Wales, of Scotland and of Ireland (although since 1921 only Northern Ireland has been part of the United Kingdom).

The cross saltire of St Patrick, patron saint of Ireland, is a diagonal red cross on a white ground. This was combined with the previous Union Flag of St George and St Andrew, after the Act of Union of Ireland with England (and Wales) and Scotland on 1 January 1801, to create the Union Flag that has been flown ever since.

The Welsh dragon does not appear on the Union Flag. This is because when the first Union Flag was created in 1606, the Principality of Wales by that time was already united with England and was no longer a separate principality.