Isn’t our flag great? Simple yet striking colour combination. Symbols of significance to most of the countries which make up the union (sorry, Wales). The ability to complain when someone hangs it the wrong way up.
The best thing is you can completely change the colour combination, and still know what it represents. You can even mow it into a lawn (I must try that for the next jubilee)! There can’t be many countries that can boast that of their flag. Next, you just need to find a dragon to wander across your lawn, and the union symbolism is complete.