My points are more about RT than the BBC. As Ronald pointed out, it is RT that is raising the spectre of Russian military intervention to protect the Russian (speaking) minority.
Seeing as the BBC has come into this, whatever your thoughts on the organisation (notwithstanding personal experiences on ops with individual journalists), I stand by my assertion that most people around the world would trust the BBC in a way they wouldn't RT (or Fox News, or whoever).
I agree Lonewolf, I wouldn't think that international law would make Putin pause for a second.