I did go to register.
The one that isn't public is still accessible to various places (and I believe are sold to some also).
The council can't or won't tell you who can access the private register.
You can have your name totally omitted if you have a very recent conviction against your ex and it is sufficiently violent enough
the bar for getting onto that is set very high and you need a lot of proof which most victims of dv don't have.
I thought it better to not go on at all as the council were so secretive about who can access the private register.