A brief look at the history of the Union Jack in colour with flags to colour… The Union Flag better known as the Union Jack is the flag of the United kingdom of Great Britain and Northern Ireland. It is one of the most famous flags in the world. Today it still retains an official or semi-official status in some of the Commonwealth Countries. It is found on the canton (upper left quarter) of many of their national flags. It is part of many ensigns (flags flown by a ship or submarine). The whole flag, or as a canton, appears on British empire and overseas territories, crown dependencies, diplomatic, government, governors and a few miscellaneous flags. Illustrated by David Woodroffe Information from Tony Batchelor