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The Thistle Clinic The Thistle Clinic Neurodevelopmental & Psychiatric Clinic
ADHD Assessment

Comprehensive ADHD Assessment for Adults & Children

Gain clarity, understand your strengths, and find the right path forward.

From £695

About ADHD

What is ADHD?

ADHD is a complex neurodevelopmental condition affecting roughly 5% of the population — around 3.5 million people in the UK, many of whom remain undiagnosed. Because early symptoms are frequently overlooked, many people aren't diagnosed until adulthood.

ADHD is not a result of poor parenting, dietary choices, or lack of effort. Research confirms real differences in brain structure and function — which is why accurate assessment matters so much.

Anatomical model of a human brain shown in cross-section
The Process

What to Expect

01
Clinical Interview

Detailed discussion of your history, symptoms, and day-to-day experience.

02
Rating Scales

Evidence-based diagnostic questionnaires aligned with NICE guidelines.

03
Developmental Review

Review of relevant history; school reports for children where available.

04
Written Report

A clear, detailed report with diagnosis and practical recommendations.

Signs & Symptoms

What Does ADHD Look Like?

Hyperactivity / Impulsivity

  • Fidgets, taps hands or feet
  • Difficulty staying seated
  • Feelings of restlessness
  • Talks excessively
  • Blurts out answers
  • Difficulty waiting their turn
  • Interrupts or intrudes on others

Inattention

  • Makes careless mistakes
  • Difficulty sustaining attention
  • Doesn't seem to listen
  • Fails to follow through on tasks
  • Poor organisation
  • Avoids tasks needing mental effort
  • Easily distracted, forgetful
Common Questions

ADHD Assessment FAQs

Our evaluations follow NICE guidelines and include detailed clinical interviews, a review of developmental history, and evidence-based diagnostic rating scales. For children, we also look at school reports where available.
Absolutely. While online appointments work well for most people, face-to-face assessments can be arranged on request at our Peterborough location.
You receive a detailed written report with practical recommendations. We are a diagnostic-only service — we can advise on next steps including onward referral for treatment or support.
Yes. Our assessments are led by a Consultant Psychiatrist and follow NICE guidelines, producing reports recognised for school accommodations, workplace adjustments, and shared care consideration.

Ready to get an ADHD assessment?

Take the first step towards clarity.

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