Register Page Redirection

I am running the latest version of WordPress and Buddypress with a heavily customized version of the DynamiX Child theme. I have also created a custom register page with a custom register form on one of my pages using a theme template rather than setting one of my pages as the register page in Buddypress.

I have noticed that if I try to visit this registration page when I am logged in, WordPress or Buddypress recognizes that I am logged in and automatically redirects me back to the homepage. I am fine with redirecting users away from the register page if they are already logged in, but I’d like to change where they get redirected to. I cannot seem to find the function that controls this though. Does anybody know how to override this behaviour and change where logged in users get redirected to when trying to view the register page? Can I create a hook that will override this function and send users who are trying to view this page while logged in somewhere else?

Thanks