I spoke to citizens advice about this and I would like to make sure they are right about this so here it goes.
My mother and father were joint tenants, they divorced she moved out and got her own property so my dad is down as a sole tenant, I live with him and so does my brother.
when he passes away would either my brother or I able to take the tenancy over as I was told a succession is only when someone has passed away not when there’s been a name change (this is what citizens advice told me).
Just to clarify no one has passed away. I just want to know for piece of mind , and how to move forward, thank you