About Us

Our Philosophy

Our aim is to provide a warm, friendly and non-judgmental environment for children, young people and their families, with a focus on working in partnership with the families that we meet. We strive to offer best practice in our assessment and therapy. We share a love for the work that we do and the hope to give children and families the best opportunity to make positive change and meet their goals.

As Calm Kids psychologists, we work closely together to support each other and we value supervision and reflective practice to ensure that we can offer the best service possible to the families that we see.

We also believe in supporting children and families holistically, so we work jointly with schools, social care and NHS teams as and when required.

What is a Clinical Psychologist?

Clinical Psychologists aim to reduce psychological distress and promote emotional wellbeing through the understanding of how people think, feel and behave. The assessment and interventions that Clinical Psychologists use are based on research and clinical experience.

Clinical Psychologists are highly trained to Doctoral level in Clinical Psychology. Registered Clinical Psychologists must have completed a British Psychological Society (BPS) accredited undergraduate degree course, followed by a full time professional training course leading to a Doctorate in Clinical Psychology. This training comprises rigorous academic, research and clinical training and experience. Clinical Psychologists are not medical doctors and do not prescribe medication.

Clinical Psychologists are trained to work with people across the life span, although most Clinical Psychologists go onto specialize in a specific field. Clinical Psychologists specialising in children and families are trained and experienced in assessing, treating and supporting children, teenagers and their parents in helping children reach their potential in all of these areas. The assessment and treatment methods used by clinical psychologists working with children and families are evidence based in scientifically validated research.  Clinical psychologists are required to maintain their knowledge and skills through continued professional development (CPD), which is audited through the Health & Care Professional Council (HCPC).

About Calm Kids Psychologists:

Dr. Rachel Mahoney, BSc Hons., DClinPsych., PGCert., CPsychol. 


Rachel is an experienced Clinical Psychologist, with over 15 years of NHS experience and 11 years of working as a clinical psychologist in various children’s services and settings, including Child & Adolescent Mental Health services (CAMHS), children’s social care and specialist services for children in care, schools, and specialist paediatrics. Rachel did her undergraduate psychology degree at University College London (UCL) and later went on to complete her doctorate in Clinical Psychology at the Institute of Psychiatry, Kings College London, including completing her doctoral research into childhood trauma. She also has a post-graduate qualification in Supervision of Cognitive Behaviour Therapy (CBT) for children and young people. Rachel’s special interests include working with children, adolescents and families, particularly where there are complex difficulties in the life of a young person or family. She uses a variety of therapy models and approaches depending on the needs of the child and family, but has particular expertise and interest in Cognitive Behaviour Therapy (CBT), mindfulness-based approaches, and working with parents and family systems. She has also been on training to develop her interest in developmental trauma and attachment-based therapy approaches, including the use of PACE (Playfulness, Acceptance, Curiosity & Empathy). Rachel practices in Kingston and surrounding areas.

Dr. Kathryn Rocha, MAHons., DClinPsych., CPsychol.


Kathryn is an experienced Clinical Psychologist with over 15 years of working in the NHS, who specialises in working with children, young people and their families. Kathryn completed her undergraduate Psychology degree in Edinburgh and then went on to complete her Doctorate in Clinical Psychology in Newcastle. She has previously worked within a Child and Adolescent Mental Health (CAMHS) setting assessing supporting families with emotional, relational and neurological difficulties. Kathryn currently works as an NHS Clinical Psychologist bringing mental health services for children to schools, both Primary and Secondary. This involves working directly with families, groups of children and supporting teachers both with individual pupils and more general mental health training.  Kathryn has a particular interest in parenting and working with parents to help them understand and manage children’s behaviours and emotions in ways that benefit the whole family. Kathryn mainly uses Systemic and Cognitive Behavioural approaches with families, and always works collaboratively alongside her clients. She has run and had specialist training in Webster Stratton Parenting Groups for parents of children ages 3 – 10 years. Kathryn is also developing her mindfulness practice and is trained to deliver the Paws B curriculum to Primary School age children.  Kathryn practices in Teddington and surrounding areas.

Dr. Jenny Lewsley, BA Hons., DClinPsych., CPsychol.


Jenny is a skilled Clinical Psychologist, with more than 10 years of NHS experience working within services for children, young people and their families, across CAMHS, school and children’s social care settings. She currently works in a service supporting teenagers and their families where there are complex and multiple difficulties.  Jenny completed her undergraduate degree at Oxford University, and later studied for her Doctorate in Clinical Psychology at the University of Bristol. She completed her doctoral research in the experiences of children with parents struggling with Obsessive Compulsive Disorder. Jenny uses a range of approaches, based on the needs of the young person and family, but has particular interest in Cognitive Behavioural, systemic and narrative approaches. She has also attended initial training on Video Interaction Guidance and hopes to develop this further in the future. She feels that a fun, flexible and creative approach is important when working with children and young people.  Jenny practices in Bracknell, Wokingham & surrounding areas.

Our Professional Membership & Affiliations

  • Health and Care Professional Council (HCPC) – We are registered as Practitioner Psychologists. The HCPC is a regulator set up by the government to protect the public. They achieve this by keeping a register of health professionals who meet their standards for training, professional skills, behaviour and health. For further details please see their website (hpc-uk.org)
  • The British Psychological Society (BPS) – We are on the BPS Register of Chartered Psychologists. This means that we have undertaken Society accredited postgraduate qualification and training, and have agreed to follow the Society’s Member Conduct Rules and be guided by the Society’s Code of Ethics and Conduct. Please check the BPS website for further details (bps.org.uk).
  • Professional Organisations including:
    • BPS Division of Clinical Psychology
    • BPS Faculty of Children Young People & Families (CYPF)
    • CYPF Independent Psychologists Network (CYPF IPN)
    • Association of Child Psychologists in Private Practice (achippp.org.uk).