I would also strongly recommend Michaela Clarke as a teacher. She teaches at Triyoga Soho as well. I have been practicing ashtanga for 6 years, I have been in many studios throughout Europe because my work requires me to travel quite a bit, and she is one of the best teachers I have met in my journeys. She gives excellent adjustments and sound advice. She values and respects the ashtanga tradition, but she is not inflexible in her thought. I consider myself lucky to be living in London this year because I can go practice with her.