Our clinical team includes Consultant Psychiatrists and specialist clinicians with deep experience in neurodevelopmental assessments for adults and children.

NICE Guideline Aligned +

Every assessment follows current NICE guidelines, ensuring rigorous, evidence-based evaluations and reports that are recognised by professionals and institutions.

Online & Face-to-Face +

Assessments are primarily conducted online for your convenience. Face-to-face appointments can be arranged on request at our Peterborough location.

No GP Referral Required +

You can contact us directly without needing a referral from your GP, making access straightforward and timely.

Book an Assessment

FAQs

Frequently Asked Questions

Do I need a GP referral to book? +

No referral is needed. You can contact us directly at any time.

What conditions do you assess? +

We assess ADHD and Autism Spectrum Disorder (ASD) in adults and children. We also offer screening assessments and medico-legal psychiatric reports.

How long does an assessment take? +

It varies by type. A screening is shorter; a full ADHD or autism assessment typically involves one or more clinical appointments. We'll give you clear timelines at booking.

What happens after a diagnosis? +

You receive a detailed written report with your diagnosis and practical recommendations. We are a diagnostic-only service — we'll advise on next steps including onward referral for treatment or support.

Ready to get clarity?

Take the first step towards understanding your mind. Book a consultation or contact us with any questions.

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About Us

Providing Exceptional Neurodevelopmental Care

A consultant-led private assessment clinic based in Peterborough.

Our Vision

Accessible, Accurate Assessments

To make high-quality neurodevelopmental assessments accessible to everyone who needs them — improving understanding, enabling early diagnosis, and supporting long-term wellbeing.

Our Mission

To provide evidence-based assessment with compassion — ensuring clear diagnosis and practical, personalised next steps for every individual we see.

Regulatory Status

The Thistle Clinic is a diagnostic-only private clinic. We do not prescribe medication or provide ongoing treatment, and therefore do not require registration with the Care Quality Commission (CQC).

Mainly online assessments
No GP referral needed
Face-to-face on request
NICE guideline aligned
Consultant Psychiatrist led
Adults & children

3

Consultant & Specialist Psychiatrists

5

Specialist Assessment Pathways

NICE

Aligned Assessment Approach

Online

& Face-to-Face on Request

Ready to take the next step?

Book a consultation or contact us with any questions.

Book an Assessment Get in Touch

Our Team & Clinics

Meet Our Clinical Team

Qualified consultant psychiatrists and specialist clinicians dedicated to accurate, compassionate assessment.

Our Clinicians

The Team Behind Your Assessment

Dr. Mohan Chawla

MD, MRCPsych, Diploma in Mental Health Law
Consultant Psychiatrist

Dr. Anusha Hevege

MD — Specialist Psychiatrist
Certified in ADHD and Autism Assessment

Mrs. Elizabeth Taitia

Registered Mental Health Nurse Practitioner

Greg Weihs

Executive Function Coach (Adult)
ADHD & Executive Skills Specialist

Dr. Raj Sankar

MBBS, M.Sc, MRCPsych
Consultant Psychiatrist

Our Locations

Where We Work

📍 Peterborough

48 Papyrus Road, PE4 5BH
Our primary clinic location.
07749 789 790

📍 London

By appointment only

49 Mount Pleasant, Farringdon
London, WC1X 0AE
Please do not visit without a confirmed booking.
07749 789 790

📍 Luton

By appointment only

7 Wellington Street
Luton, LU1 2QH
Please do not visit without a confirmed booking.
07749 789 790

💻 Most assessments are conducted online via secure video call, accessible from anywhere in the UK. Face-to-face appointments are available on request.

Ready to get started?

Contact us to book your assessment or ask any questions.

Book an Assessment

ADHD Assessment

Comprehensive ADHD Assessment for Adults & Children

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

£570 – £895

Book an ADHD Assessment

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.

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The Process

What to Expect

1

Clinical Interview

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

2

Rating Scales

Evidence-based diagnostic questionnaires aligned with NICE guidelines.

3

Developmental Review

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

4

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

What does the ADHD assessment process involve? +

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.

Can we request a face-to-face assessment? +

Absolutely. While online appointments work well for most people, face-to-face assessments can be arranged on request at our Peterborough location.

What happens after a diagnosis? +

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.

Will online reports be accepted by schools or employers? +

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.

Book Now Ask a Question

Autism Assessment

Autism Assessment for Children & Adults

Accurate diagnostic clarity from a specialist MDT team.

£1,495

Book an Autism Assessment

About the Assessment

Specialist MDT Evaluation

Our Autism Assessment is a highly specialised diagnostic evaluation for individuals of all ages. Blending careful clinical observation, detailed developmental review, and structured diagnostic tools, we identify autistic traits and evaluate communication and behavioural patterns.

Our goal is an accurate diagnosis alongside practical, clear next-step recommendations for ongoing support.

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Recognising Autism

Signs of Autism in Children & Adults

👶 In Children — Social & Communication

Not maintaining eye contact by 9 months
Not responding to name by 9 months
Using few or no gestures by 12–18 months
Not joining other children in play by age 3
Lack of pretend play by age 4

👶 In Children — Behaviours & Routines

Lining up toys; distress if order is changed
Repetitive movements — hand flapping, rocking
Repeating words or phrases (echolalia)
Playing with toys the same way every time
Significant distress at routine changes

🧑 In Adults — Social & Communication

Finding eye contact uncomfortable
Difficulty reading sarcasm or social cues
Feeling out of sync with social groups
Exhausting to navigate small talk
Difficulty expressing or reading emotions

🧑 In Adults — Behaviours & Routines

Deep, intense interests in specific topics
Strong reliance on daily routines
High anxiety when routines are disrupted
Sensory sensitivities to sounds, lights, textures
Unusual responses to sensory input

Common Questions

Autism Assessment FAQs

How do you assess Autism in adults versus children? +

For children, the assessment involves developmental history, parental interviews, and observing behavioural and communication patterns. For adults, the focus includes self-reporting, exploring childhood history, and current day-to-day experiences. Both follow gold-standard clinical frameworks.

Can we do this in person? +

Yes. We understand that online environments can present sensory or communication challenges. Face-to-face assessments are available on request so you or your child feel comfortable throughout.

Are your Autism reports recognised by schools and local authorities? +

Our assessments follow NICE guidelines and are conducted by qualified specialist clinicians, producing reports recognised for educational support, workplace accommodations, and professional referrals.

Ready to book an Autism Assessment?

Our specialist team is here to help.

Book Now Ask a Question

Combined Assessment

Combined ADHD & Autism Assessment

A comprehensive, dual evaluation to understand your complete neurodivergent profile.

£1,950

Book a Combined Assessment

Why Combined?

When ADHD & Autism Co-occur

ADHD and Autism frequently co-occur — a combination often called AuDHD in the neurodivergent community. When both traits exist together, they interact in complex ways that a single-focused assessment might miss.

Booking them together saves time, reduces cost, and allows our clinicians to see how the traits interact with each other in real-time.

What's Included

✓Full ADHD clinical evaluation
✓Full Autism specialist assessment
✓Unified comprehensive diagnostic report
✓Practical next-step recommendations

Common Questions

Combined Assessment FAQs

Why book a combined assessment instead of two separate ones? +

Booking together saves time and reduces overall cost. More importantly, it lets our clinicians look at how the traits interact with each other, giving a more accurate and complete picture.

Will I receive two separate reports? +

You receive a single, unified diagnostic report covering both ADHD and Autism, making it easy to share with schools, employers, or healthcare providers.

What if I only have one of the conditions? +

That's completely fine and a common outcome. The goal is accuracy. If you meet criteria for only ADHD or only Autism, your report will accurately reflect that and guide your next steps.

Not sure which assessment is right?

Contact us and we'll help you find the best pathway for your needs.

Get in Touch

Screening Assessment

Professional Screening Assessment

A quick, accessible first step to understanding your neurodevelopmental health.

Enquire About Screening

About Screening

The Right First Step

A screening assessment is a shorter, focused evaluation that helps determine whether symptoms are consistent with ADHD or Autism — and whether a full diagnostic assessment is recommended.

It is not a formal diagnosis, but provides clarity and direction — typically conducted online, taking 30–45 minutes.

Common indicators for screening

→Difficulty maintaining focus, organising tasks, or managing time
→Social communication challenges or feeling "disconnected"
→Unexplained underperformance despite hard work
→Unsure whether to pursue a full ADHD or Autism assessment

Common Questions

Screening FAQs

Does a screening give me a formal diagnosis? +

No. A screening flags potential neurodivergent traits and provides a clear indication of whether to proceed with a full diagnostic evaluation.

How long does it take? +

Screening assessments are mainly conducted online and take approximately 30–45 minutes, involving validated questionnaires and a brief clinical review.

What happens if the screening shows signs of ADHD or Autism? +

We provide a clear pathway to transition into our full ADHD or Autism assessment services. Because our clinic is Consultant Psychiatrist-led, your transition to a formal diagnostic pathway will be seamless.

Start with a screening

Contact us and we'll help you find the right path forward.

Get in Touch

Medico-Legal Reports

Medico-Legal & Psychiatric Assessments

Expert psychiatric assessments prepared for legal, insurance, and official purposes.

Enquire About Medico-Legal Reports

Our medico-legal reports are prepared by qualified Consultant Psychiatrists and are suitable for use in legal proceedings, insurance claims, employment disputes, and other formal contexts. Please contact us to discuss your specific requirements.

Need a medico-legal report?

Contact us to discuss your requirements.

Get in Touch

Official Reports

Reports for Schools, Employers & Authorities

Clear, professionally prepared reports for a range of official purposes.

Enquire About Reports

Following a diagnostic assessment, we can prepare official reports tailored for specific purposes including:

✓School and educational authority reports
✓Employer and workplace accommodation letters
✓Insurance company reports
✓EHCP (Education, Health and Care Plan) support documentation
✓Other official or professional purposes

Need an official report?

Contact us to discuss your requirements.

Get in Touch

FAQ

Frequently Asked Questions

Clear answers about our assessments, booking process, and what to expect.

Booking & Access

Getting Started

Do I need a GP referral? +

No referral is required. You can contact us directly to book at any time.

How do I book an appointment? +

Contact us via the form on this website, by phone, or by email. We'll help you choose the right assessment and a suitable time.

How will I know my appointment is confirmed? +

Once booked, you will receive a confirmation email with all appointment details.

How can I reschedule? +

Contact us by phone or email and we'll help you find a new time.

The Assessment

What to Expect

What happens at my first appointment? +

A detailed clinical interview covering your concerns, history, and current symptoms, which guides the assessment process and next steps.

How long does an assessment take? +

It varies by type. A screening is shorter; a full ADHD or autism assessment typically involves one or more clinical appointments. We'll give you clear timelines at booking.

Are assessments online or in person? +

Primarily online via secure video call. Face-to-face appointments can be arranged on request at our Peterborough clinic.

What happens after a diagnosis? +

A detailed written report with your diagnosis and practical recommendations. We are a diagnostic-only service — we'll advise on next steps including onward referral for treatment or support.

About the Clinic

Our Service

Are your reports recognised by schools and employers? +

Yes. Led by Consultant Psychiatrists and following NICE guidelines, our reports are recognised for school accommodations, workplace adjustments, and professional referrals.

Do you need to be CQC registered? +

No. The Thistle Clinic is a diagnostic-only private clinic. We do not prescribe medication or provide ongoing treatment, and therefore do not require CQC registration.

Are assessments available for children as well as adults? +

Yes. We provide specialist assessments for both adults and children, with approaches tailored to age and individual needs.

What conditions do you assess? +

ADHD and Autism Spectrum Disorder (ASD). We also offer screening assessments and medico-legal psychiatric reports for official or legal purposes.

Still have a question?

We're happy to help. Contact us directly and we'll get back to you promptly.

Get in Touch

Contact Us

Get in Touch

Book an assessment, ask a question, or find out which pathway is right for you.

Contact Information

Book or Enquire

Full Name *

Email Address *

Phone Number

Assessment of Interest

Your Message

This will open your email programme with your message pre-filled — please press send there to complete your enquiry.

Legal

Privacy & Disclosures Policy

How we collect, use, and protect your personal data.

Who We Are

Thistle Psychiatry Ltd (trading as The Thistle Clinic) is the data controller for personal data collected through this website. Company number: 17237978. Registered address: 47 New Lakeside, Peterborough, PE7 8HU.

Regulatory Status

The Thistle Clinic is a diagnostic-only private clinic. We do not prescribe medication or provide ongoing treatment, and do not require registration with the Care Quality Commission (CQC).

What Data We Collect

We may collect your name, email address, phone number, and enquiry details when you contact us; clinical information provided during assessment bookings; and anonymised usage data via cookies (with your consent).

How We Use Your Data

Your data is used to respond to enquiries, arrange and conduct assessments, and fulfil our clinical obligations. We do not sell your data to third parties.

Your Rights

Under UK GDPR, you have the right to access, correct, or request deletion of your data. Contact us by email to exercise these rights.

Contact

For data protection queries: info@thethistleclinic.co.uk

General Adult Psychiatry

General Adult Psychiatry & Dementia Assessments

Comprehensive psychiatric assessments for adults, including memory concerns, cognitive changes, and dementia-related presentations.

Coming Soon

Get in Touch

Conditions We Treat

What We Can Help With

Our general adult psychiatry service will offer comprehensive assessment and care across a broad range of mental health conditions, delivered by our experienced Consultant Psychiatrist team.

This service is currently in development. Contact us to register your interest or discuss your needs.

Conditions we will treat

✓Anxiety Disorders
✓Bipolar Disorder
✓Depression
✓Eating Disorders
✓Insomnia & Sleep Issues
✓Learning Disabilities
✓Obsessive Compulsive Disorder (OCD)
✓Older Adults' Mental Health (65+)
✓Perinatal Mental Health
✓Women's Mental Health (PMS / PMDD / Perimenopause / Menopause)
✓Personality Disorders
✓Stress & Burnout
✓Trauma & PTSD

Common Questions

General Psychiatry FAQs

When will this service be available? +

This service is currently in development. Contact us to register your interest and we will notify you as soon as it launches.

Can I get support for these conditions in the meantime? +

If your needs relate to ADHD or Autism, our existing assessment pathways are available now. For other conditions, we recommend contacting us to discuss your situation and we can advise on appropriate next steps.

Do I need a GP referral? +

No referral is required. You can contact us directly to enquire or register your interest at any time.

Dementia Assessments

Memory, Cognitive Change & Dementia

We also provide dementia assessments for adults experiencing memory difficulties, cognitive changes, confusion, functional decline, or concerns raised by family members or carers.

Our assessments are conducted by Consultant Psychiatrists with specialist experience in older adults' mental health — providing careful, dignified, and thorough evaluations alongside clear recommendations and next steps.

When to Consider an Assessment

Signs That May Indicate a Need for Assessment

If you or someone you care for is experiencing any of the following, a specialist assessment may be helpful.

Memory & Cognitive Changes

Persistent memory difficulties
Increasing forgetfulness
Confusion or disorientation
Difficulties managing everyday activities

Behaviour & Wellbeing

Changes in behaviour or personality
Concerns regarding decision-making or independence
Concerns raised by family members or carers

How We Can Help

Our Dementia Assessment Service

Assessment & Diagnosis

Memory and cognitive concerns
Assessment of possible dementia symptoms
Differential diagnosis, including mental health causes of cognitive symptoms
Assessment of co-existing psychiatric conditions

Support & Next Steps

Changes in mood, behaviour, or personality
Confusion, disorientation, or functional decline
Family and carer concerns
Recommendations for treatment, support, and next steps
Liaison with GPs and onward referral where appropriate

What to Expect

The Assessment Process

1

Comprehensive Psychiatric Assessment

A thorough clinical evaluation conducted by a Consultant Psychiatrist.

2

Detailed Memory & Cognitive Review

Careful assessment of memory, thinking, and day-to-day functioning.

3

Medical & Psychiatric History

Review of relevant medical, psychiatric, and family history.

4

Consideration of Alternative Explanations

Exploring other potential causes, including mood, sleep, and physical health conditions.

5

Review of Current Medications

Assessment of whether medications may be contributing to cognitive symptoms.

6

Clinical Recommendations & Next Steps

Clear written recommendations, liaison with your GP, and onward referral where appropriate.

Common Questions

Dementia Assessment FAQs

When should someone consider a dementia assessment? +

If there are ongoing concerns regarding memory, thinking, confusion, behaviour, daily functioning, or changes noticed by family members or carers, a specialist assessment may be helpful.

Can mental health problems look like dementia? +

Yes. Depression, anxiety, sleep problems, medication effects, physical health conditions, and stress can sometimes affect memory and concentration. A careful assessment can help identify contributing factors.

Can family members or carers be involved? +

Yes. Where appropriate and with consent, family members or carers can provide valuable information regarding changes over time.

What happens after the assessment? +

Following the assessment, we provide clear clinical recommendations, which may include treatment options, support planning, liaison with the GP, or onward referral when appropriate.

⚠️ Urgent concerns? If urgent concerns are present, including rapid deterioration, acute confusion, or immediate safety concerns, please seek urgent medical attention by contacting your GP urgently or calling 999.

Concerned about memory or cognitive changes?

Contact us to discuss a dementia assessment or to find out more about our upcoming general psychiatry services.

Contact Us to Discuss an Assessment

Finally get the clarityyou've been looking for

ADHD Assessments

Autism Assessments

No GP Referral

Online & In-Person