General
Quality information about the types of work available in counselling, counselling psychology and psychotherapy, from Prospects.co.uk
Lots of information about training in counselling & psychotherapy, from the British Association for Counselling & Psychotherapy.
Lots of useful information about becoming a Counselling Psychologist, from the BPS
Counsellors
Careers page from the British Psychological Society. Includes downloadable pamphlet called 'So you want to be a Psychologist?'
To work as a cognitive behavioural therapist you must first have a professional qualification (and experience) in psychology, nursing, counselling, occupational therapy, social work or education. You can then take an approved CBT course.
Psychotherapists
Includes information about training as a psychotherapist.
Information about the professional body for psychoanalysts in the UK
The Royal College of Psychiatrists offers free membership to medical students, this page contains information on progressing from being a medical student to being a psychiatrist.
Other
Lots of information, from the British Association of Art Therapists.
The British Association of Dramatherapists offers information on training schemes to start work in their field.
Training courses on Dance Movement Therapy
Information on working as a Hospital Play Specialist.