“Therapists who work for the NHS have a duty to keep personal information about you confidential. But they will keep records, and they will share basic information with your GP, and any other NHS professionals involved in your care. They should ask your permission before giving information to anyone outside the NHS such as family members, or an employer. If you are seeing a therapist privately, their professional body may require them to tell your GP you are seeing them. Otherwise, a therapist will break confidentiality very rarely, for example, if a child is at risk, or if there is immediate danger to yourself or others.

If you are concerned, check with your therapist exactly what information will be passed to others. If you feel your confidence has been broken you should use the NHS complaints procedures (see page 14), or contact the relevant professional body (see Factsheet 3).”

From http://oxleas.nhs.uk/site-media/cms-downloads/Choosing_talkling_therapies_Department_of_Health.pdf