Why is there a British flag on the Australian flag?

The reason why there is a British flag on the Australian flag is that Australia was a British colony before, joined the current Commonwealth system after administrative independence, and continued to use the colonial flag after the resolution of the Australian Parliament. The flag of the United Kingdom of Great Britain and Northern Ireland is in the upper left corner of the Australian flag, indicating the traditional relationship between Australia and Britain. There is an English herringbone flag near the upper corner of the flagpole, and a white seven-pointed star near the lower part of the flagpole, symbolizing the six states and the federal district that make up the Commonwealth of Australia.