When logged into my account, I can't see the photographs of a Non-Friend.
When logged into my Mum's account, I can.
My Mum isn't their Friend either.
Why can't I see the photos when I'm logged in to my own account?
That person hasn't Blocked me as I can see their Profile, so if we're not Friends, how can they only Block me from seeing their Photos?
Privacy settings don't allow you to specify individual viewers where you are not Friends with them.