Wait until Brexit happens in your FM20 save.
Open FMSE20, load your game.
Go to Nations tab and search for England.
Double-click on England and go to Agreements tab.
Add the 2 Agreements as shown in the screenshot below.
Start dates are not important, you can leave whatever is the default.
Save.
Open FMSE20, load your game.
Go to Nations tab and search for England.
Double-click on England and go to Agreements tab.
Add the 2 Agreements as shown in the screenshot below.
Start dates are not important, you can leave whatever is the default.
Save.