Christina Richards is a Senior Specialist Psychology Associate and a Clinical Research Fellow within the NHS. She is a member of the British Association for Counselling & Psychotherapy (BACP) and an Associate Fellow of the British Psychological Society. As well as being an activist and writer she lectures on trans, non-binary and other genders; sexualities; and critical mental health.  Walter Pierre Bouman is a medical doctor, psychiatrist, sexologist and psychotherapist specialising in gender and sexuality.  He is Head of Service at the Nottingham National Centre for Gender Dysphoria, Deputy Editor of Sexual and Relationship Therapy - International Perspectives on Theory, Research and Practice - and currently Treasurer and Executive Board member of World Professional Association for Transgender Health (WPATH). Meg-John Barker is a writer, therapist, and activist-academic specialising in gender, sexuality, and relationship diversity. Meg-John is a senior lecturer in psychology at the Open University and United Kingdom Council for Psychotherapy (UKCP) accredited psychotherapist, and has over a decade of experience publishing on these topics including the book Rewriting the Rules.