British Association for Counselling and Psychotherapy - the professional membership organisation with helpful sources to find a counsellor, learn more about talking therapies and ask questions or make a complaint about your therapist

Counselling Directory - this directory has a list of professionally trained counsellors and therapists all over the UK

Counselling can be a financial commitment but there are organisations that offer low fee or free counselling to individuals in financial difficulty in the SE1 area:

Waterloo Community Counselling

The Guild of Psychotherapists