Everything discussed stays between us. I will not contact or share information with your employer, GP, family, or anyone else, nor would I disclose the fact you are attending sessions if someone asks. There are always exceptions to complete confidentiality, but these are extreme and only occur where I am bound by law or concerned about the safety of yourself or someone else. Then we would discuss who I need to talk to and ask for your consent.
If you require a written assessment or report for any reason (for example, a GP referral or to authorise health insurance sessions) then this report would be shared with you first for your approval. All written material (including your contact details and counselling agreement), are protected by General Data Protection Regulations.