The Union Jack ( Flag )
The flag of the United Kingdom commonly known as the Union Jack , embodies the emblems of the three countries under one sovereign . The emblems that appear on the Union Flag are the crosses of the three patron saints .
the red cross of St. George , for England on a white ground
the white diagonal cross for St. Andrew
the red diagonal cross ascribed to St Patrick , for Ireland on a white ground .
The final version of the union flag , including the cross of St. Patrick , appeared in 1801 , following the the union of Great Britain with Ireland . The cross remains on the flag , although now only Northern Ireland is part of the United Kingdom .
Wales is not represented in the Union Flag , when the first version of the flag appeared , Wales was already united with England .