It's absolutely not an explanation as far as I'm concerned. BBC Worldwide does operate in the UK, it sells DVDs, magazines, etc, so there seems no reason to lo

It's absolutely not an explanation as far as I'm concerned. BBC Worldwide does operate in the UK, it sells DVDs, magazines, etc, so there seems no reason to lock UK users out of a specific website just "because" - the explanation they give does nothing to expand on the "because" element.