‘Psychotherapy’ and ‘Counselling’ are often used interchangeably. Essentially both terms refer to talking therapy. You should find that a psychotherapist will have a more advanced and rigorous level of training. Sometimes it is considered in terms of ‘counselling’ as a means of working on particular, more easily defined or specific issues or areas of your life and ‘psychotherapy’ being a way of considering more over-arching, longer-term and possibly more deep-rooted or complex difficulties. As a psychotherapist, I am equipped to work with a range of difficulties and problems, both more specific and also more complex.
Unfortunately as it stands in the UK, anyone can call themselves a counsellor or a psychotherapist, which is why it is so important to ensure the training credentials and professional memberships of therapists you consider working with.