Team GB in Olympics

Going back a few versions of the game I was able to add Team GB to take part in the Olympics with no issues

now this doesnt seem possible 

if anyone has managed it please let me know how 

IIRC when I did it last team GB was called Great Britain in the DB

now it is called this

however if you set The kingdom of GB [Team GB] to replace one of the qualified teams they dont take part their place always goes to Belgium U23 in several tests I have done

I replaced a European qualified team with GB in both set of rules- [there are 2 showing in advanced rules one default/other specific for 2021]

both sets of rules- default and 2021 have teams registered for the comp but I cannot get GB to take part if I use another nation eg portugal/sweden/serbia etc etc they take part

I then thought I had cracked it as I seem to remember you had to use England rather than GB and the game defaulted this to Team GB U23 for Olympic purposes

sadly that doesnt work either

as it verifies with England set but in game it defaults to IMO the highest ranked European nation -Belgium

so any input as to how to get GB to play in the Olympics 

just to clarify this only happens with team GB I can get any other country to qualify and take part