It comes out in different regions in stages. It's not even certain that the UK will be a part of it There's no date published for release yet. So will have to wait and see
I would say if ur in the UK as iam,any beta version or update we might get it after a country like Tibet,the UK is very slow at recieving updates,very tongue in cheek remark from me.
As for one ui 7.0 not working with banking apps that was the case with all other beta but iceuniverse suggests this time around that might not be the case I guess only time will tell