Because, although the countries of the UK share a common standard (or flag) they also retain their own individual identities - demonstrated by flying the flag of their patron saint.
australia
Australia, Hawaii, etc.
Australia, Fiji and New Zealand
africa
i dont know ok so there dont ask me again
africaaustraliaAns 2 - There is no such country as 'Africa' - Africa is a continent with over 40 separate countries !Australia, New Zealand, 4 Canadian provinces, and 13 British Overseas Territories all have the Union Flag as part of their own.
England or the United Kingdom
because they want to
The flag of the United Kingdom (of which England is a part) is the Union Flag. The flag of England alone is the St Georges Cross. It's similar to US states having their own flag and also the Stars and Stripes.
All 4 countries do.
The USA has its own flag and the United Kingdom has not got a flag
because the king died