Your latest local directory would usually have details of all doctors and medical professionals in London, including CBT (Cognitive Behavioral Therapy) therapists. For reviews and referrals, look up on the internet to read few client feedbacks preferably from independent websites and blogs. Find THE BEST cbt therapist in London here. Also ask around and try to meet some patients to help to come to a decision.
The French are frantically trying to learn English and there is a demand for TEFL teachers in the country. The TEFL certificate should be accredited to either of CELTA, Trinity or IATQuO. If you are outside the EU, you need a visa to work in France. Among English courses, Business English is in utmost demand. Online TEFL courses from https://www.mytefl.net/ will help you get there.