Site home page redirecting to login page

Hi all, I have done something somehow to redirect my root URL blog to the login page only.

I have deactivated the two login redirect plugins to see if they had anything to do with it but no.

So, if I go to my homepage / top url which obviously is also my '/' site, it redirects me to my wp-login page.

Any ideas how I did that and can stop it happening?

Thanks