Union Jack Union Jack The Union Jack, or Union Flag, is the national flag of the United Kingdom. The flag also has an official or semi-official status in some other Commonwealth realms: for example, it is a ceremonial flag in Canada by parliamentary resolution, and known there as the Royal Union Flag. Further, it is used as an official flag in some of the smaller British overseas territories. The Union Flag also appears in the canton (upper left-hand quarter) of the flags of several nations and territories that are former British possessions or dominions, as well as the state flag of Hawaii.
Union Jack these arrangements, the Union Jack was subordinate to the National Flag. As the two flags had to be the same size, it meant that the Union Jack was made in the ratio 2:3 rather than the usual 1:2. The flying of the Union Jack alongside the National Flag ended on 6 April 1957. The predecessor of the Union Jack, the flag of Great Britain, came into use in what is now Canada at the time of the Scottish settlement of Nova Scotia in 1621. The Union Flag was also the official flag of the Dominion of Newfoundland and continued in