Tonic Weight Loss Surgery London, we have over 30 years’ experience in bariatric surgery. Working directly with our surgeons, we are dedicated to providing 100% patient care and offer a unique personal aftercare package. We hold weekly clinics and offer patients FREE consultations with the surgeons, who are all senior NHS bariatric consultants registered with the General Medical Council. Our surgery is carried out locally at a private hospital. Our London Clinic is situated in renowned Harley Street, approximately a 5-minute walk from Bond Street tube station. All of our surgery is carried out locally in our luxury private hospitals.