So BBC has FOI (foi@bbc.co.uk) and I wish to email them to request how they precisely intend to do iPlayer detection methods without invasion of privacy and best use of public funds. HOWEVER I wish to crowd source the correct language for this request. I will re-edit this post with latest updates. I'll start the email later after reading up on some FOI language.
You'd probably need to find some way around what i guess is going to be their reply, this PDF gives you an example of what i guess it would be.
Yes, there's no way they are giving out this info. Not that it's not worth trying. It just seems like a long shot.