I really recommend Christina Hazell (based in Streatham but travels all around London). She does Swedish, Deep Tissue and Antenatal and Postnatal massage treatments.
She has a BTEC Level 4 in Holistic Massage from massage school Essentials for Health, and is fully insured and registered with the Federation of Holistic Therapists.
http://www.christinahazell-massage.com/