Analysis of information sources in references of the Wikipedia article "Σημαία του Ηνωμένου Βασιλείου" in Greek language version.
For the avoidance of doubt and the sake of convenience, Garter King of Arms, under the authority of the Earl Marshal, has approved two versions of the Union flag as being accurate representations suitable for use. These are of the proportions 5:3, commonly flown on land; and 2:1, commonly flown at sea.
