Take the unhistorical route as the UK. Turn the Allies to the dark side and go fascist, or support the Revolution and go Communist.
This is a little mod I made in my spare time to make the UK Tree more fun to switch ideologies with. It is the same focus tree, but with the requirements and benefits changing depending on what ideology you are. It should work with the Torch Patch. I have no idea how it will work with Together for Victory