When you are searching for a therapist, it is important that you ensure they are registered with a professional body!
There are a few organisations out there, in particular: BACP, NCS, UKCP.
These organisations ensure that only individuals who are appropriately trained, are listed on their register, and provide therapy.
Individuals who are registered with a professional body are expected to adhere to each organisations professional and ethical commitments to ensure any therapeutic service they deliver, is practiced safely, and ethically.