Believe me Collective its all politics as is so much in Tibetan Buddhism. This isnt the time or place but there are two sides to the story. Basically the Dalai Lama told them to stop a particular practice because the Tibetan State Oracle ( a man who goes into a trance and reads the future
said so )
This practice had been practised by the Kadampa for centuries and among its adherents was the Dalai Lamas own tutor..The Kadampa refused to stop practicing it and have been hounded ever since by the Dalai Lamas agents in Dharamsala...there have even been reported murders on both sides.
All of which is pretty tacky all round. But the Kadampa are basically good hearted and more than able to teach Vipassana ( Vipashnya ) and Samantha ( Shamata )..You don't need to get caught up in the other stuff.
You also have an F.W.B.O. centre in Cardiff ( Friends Of The Western Buddhist Order ) and within in their ranks they have some first class meditation teachers. Just avoid the politics.