Background: I'm based in the UK, specifically in England whilst my brother is in Scotland. We are also both adults.
I have a bit of a weird situation and I wanted to know where I stand legally.
Firstly, I'm estranged from my father and have been for nearly 10 years with absolutely no contact. I do not want any contact with him for a number of reasons including toxic behaviour (which will become apparent below) and I have made him aware multiple times (as I was breaking contact with him) that I do not wish to have any contact with him.
Most of my family have accepted this and will not even discuss my personal life with my father on my express wishes.
My brother on the other hand does have regular contact with my father and recently my father has been making claims that he "cannot move on with his life" without knowing about me specifically and is making threats towards his own life if he cannot "resolve" this. To clarify I don't want my father to take his own life, rather seek help from an appropriate professional.
I don't want my father to know anything about my life or where I am currently living, but my brother has now given me an ultimatum stating he is going to hand over my contact/personal details even without my consent because he can no longer deal with my father's behaviour. I have been explicit in stating he does not have permission to do this.
Can he legally provide my personal information to another person without my consent in this scenario? Is my brother breaking any laws by handing my information over against my wishes?
UPDATE: In relation to being on telephone directories and Internet searches - my father doesn't know my current location and I've legally changed my surname so it would be almost impossible to initially look me up without my brother providing my personal information.