On a sidenote- the European badger (Meles Meles) territory does not stretch to China or Siberia. Is it not a common belief that most brushes originates from the Meles Meles..?
Not a common belief, if only because brush-makers and customers are unlikely to know about the subtle difference between M. meles and its close cousin M. leucurus, the Asian badger. Sometimes we hear rumors that two-band brushes might be made of hog badger (Arctonyx collaris), another genus entirely. And then there are occasional questions about using American badger (Taxidea taxus), yet another genus. What this comes down to is that brush-makers do not tell us exactly what they are selling. To be fair to them, most of us buyers only care about how it looks, feels, and lathers.
Getting back to Meles, from what I can tell there is about as much difference between a UK badger and one from mainland Europe both M. meles as between the two Eurasian species. The existence of both species is a happy outcome for brush-makers, though, because while it is almost impossible to offer products made from M. meles, there are fewer laws about M. leucurus.
I wrote a bit more about this in an older thread: http://badgerandblade.com/vb/showthread.php/163327-M-meles-v-M-leucurus.