Union Jack redesigned to emphasise the counterchanging philosophy behind the saltires.
from /r/vexillology Top comment: I've noticed a lot of people don't quite understand that the red saltire is meant to be "offset", so I decided to create this design to solely explain the original Union Jack. The Union Jack contains the red cross and white field of St George's (England) on top. Here, I've added the gold cross and black field of St David's (Wales) to show that the white fimbriation around the red cross is actually from the white field of St George's flag. The saltire is one half St Andrew's and one half St Patrick's. To emphasise this, I've cut the blue field from St Andrew's in half and replaced it with the white field from the St Patrick's flag. This white field ends at the black of St David's. In the original flag, the white of St Patrick's is limited to just a thin strip, because it's a junior partner in the union. It also technically ends where it does in this flag, but because the white of St George's is the same colour, you don't notice it. Sorry it took me so long to write this, but people IRL kept distracting me.