Other sites that may be of interest:
The Institute of Transactional Analysis is the UK body that promotes and regulates the use of Transactional Analysis
The European Association for Transactional Analysis (EATA) is an umbrella organisation made up of the professional bodies for Transactional Analysis throughout Europe.
The British Association of Counselling and Psychotherapy is a professional body representing counselling and psychotherapy with over 37000 members and works toward a better standard of therapeutic practice.
The Berne Institute is a training organisation that offers a range of Transactional Analysis courses, from free evening seminars to full training in Psychotherapy.
ITJAR is the International Journal for Transactional Analysis