Hi there
Kasia yoga is great. I've done antenatal yoga and hatha yoga with her and she's very gentle and knowledgable.
Based at Vestry hall, 10A Wiseton Road, Wandsworth Common, London SW17
Email Kasia for more details (she doesn't have a website I don't think) - classes are currently on a summer break but recommence in Sept.
kasiayoga@hotmail.com