Group therapy takes many forms. The groups are variously referred to (often interchangeably) as London counseling groups, London support groups, London mutual support groups or peer support groups, self help groups, stress coping groups, workshops and mental health groups. They are moderated by a professional group counselor, group therapist or group psychologist and generally focus on a specific issue or client profile (e.g. men or women etc).
I have helped numerous clients succeed in significant weight loss journeys that involve losses of over 20-30 kg in body fat over the space of 1-2 years or more. I actually find such longer term journeys more rewarding as they allow me to teach my clients about the impact of nutrition and lifestyle habits on their physiology. This not only helps them, but also helps those closest to them as well.