
A small, multi‑disciplinary practice for autism, ADHD and mental health assessments. For children and adults. In Harley Street, in Ware, or wherever you are.
RDA Autism & ADHD Practice provides specialist, high‑quality and individualised assessments for children and adults seeking a private autism or ADHD diagnosis. Our clinicians work collaboratively, with a strong commitment to neuro‑inclusion at every stage of the process.
We value each individual's personal journey, adopting a trauma‑focused approach. Alongside diagnostic assessments, we offer specialist services across psychiatry, psychology, speech & language therapy and occupational therapy.
RDA is regulated by the Care Quality Commission and follows guidelines set out by the National Institute for Health and Care Excellence. No GP referral is required to book in.
A GMC‑registered Consultant Child & Adolescent Psychiatrist, HCPC‑registered Counselling and Clinical Psychologists, an HCPC Occupational Therapist with Sensory Integration practice, and an HCPC Speech & Language Therapist.
A small, multi‑disciplinary, dedicated team drawing on current evidence‑based research, and lived neurodivergent experience.
Neuro‑inclusive and affirming theories, research and experiences shape our service. Difference, not deficit.
Many autistic people and ADHDers experience trauma in cumulative, everyday ways — and trauma can present differently in neurodivergent people. We hold space for that.
A booking conversation gathers any background, and a clinician sends initial screening tools that help shape your individualised treatment plan.
Book the assessment that fits — ADHD, autism (ADOS‑2), child or adult psychiatry, speech & language, occupational therapy and more.
A diagnosis means different things for different people. We continue alongside you, with recommendations, signposting, and optional follow‑ups.
Each assessment involves a robust process: gathering background information, reports from different sources, and a diagnostic assessment. We offer some concessionary clinics at a reduced rate — please call us for more information.
Completed preferably in person, or online via secure link. A comprehensive report with recommendations and signposting advice follows.
Two appointments, with one ideally in person, including the ADOS‑2 observation. A comprehensive report with recommendations and signposting follows.
We encourage in‑person assessments where possible. Comfort, safety and accessibility look different for everyone, so most assessments can also be completed online.



We strive to offer a respectful, compassionate, professional service. Share any feedback — compliments, complaints, suggestions, or reflections — via your clinician, by email, by phone, or anonymously through the form.
Leave your details and we'll be in touch within 48 hours. Or call us directly. No GP referral needed.