Alex.. According to FB you can Follow without being friends (maybe a security setting why you're seeing different).

From the Facebook help page...(sorry can't post links)

You automatically follow people who you're friends with. You can also follow Pages (example: businesses, organizations, brands) and people who aren't your friend on Facebook but allow everybody to follow them.

When you follow someone or a Page, you may see updates from that person or Page in your News Feed. If you like a Page, you'll automatically follow it.

Some Pages and well-known public figures with large followings are verified by Facebook and have a blue badge next to their names to help you know that they're who they claim to be.

Pretty much how I expect following to work

James..

I'm looking at it from the point of Privacy! I must make myself Public and basically switch-off the privacy system to enable members to follow but anyone can send a friend request.

Why does following seem to require you to turn of your privacy (I thought someone said they were linked)?

But all that said..

No one has still explained the logic in UNA of wanting to Unfollow/Follow a Friend. I don't get the thought behind first becoming a Friend and then second deciding if I want to follow or not??