What is the relationship between Britain, Australia and New Zealand?

Australia and New Zealand are both members of the Commonwealth, and they have deep roots with Britain in history, so the national flags of the two countries are similar. It is said that they have deep roots, because they were newly developed areas during the British colonial period. With the development of time, the proportion of whites is relatively large, and most of these whites are descendants of British immigrants. The Commonwealth is an organization that Britain exerts influence on other federal member countries in politics, military affairs, finance, economy and culture. The Commonwealth is not a country and there is no central government. The king of England is the nominal head of the Commonwealth. Britain is no longer the master of the Commonwealth, which is just a loose political and economic consultation and cooperation organization. The word "meter" will be printed on the national flags of some countries in the Commonwealth. In fact, the M flag represents the cultural influence of Britain in history. In some places, although Britain's influence has lost, the flag still exists. In addition to Australia and New Zealand, there are flags of small countries such as Tuvalu and British overseas territories with the word "meter", and the flags of some countries such as the United States, Canada and Australia also have the word "meter" (these countries are federal countries and each state has its own flag).