Hi, I would highly recommend Becks Balson. I go to her community class every Tuesday morning at the Training and Resource Centre in Wandsworth, but she also comes to my home for a private session with my husband and I. He has a bad back and she has really been helping with that and when he can't make it for the session then she focuses on what I want, which is always the pelvic floor! She is very relaxed and her whole ethos is that yoga is not about what you look like but how you feel. She believes that yoga is for everyone and so is always happy to tailor the sessions to your needs and fitness levels. Plus she has the biggest heart ever. My yoga sessions with her have not been great just for my body but also for my mind.
She is very mindful in her practice and makes all sorts of her own oils and scents that she uses in her practice if you want.
You can contact her through Facebook - https://www.facebook.com/yogabybecks/