Phoebe WilsonOn 30 July 2026, Channel 4 announced a new documentary that immediately began trending across UK social media: The Great ADHD Myth? — a 60-minute film in which Dr Max Pemberton, a full-time NHS psychiatrist, investigates the 200% rise in ADHD referrals between 2020 and 2025 and asks whether the condition is a genuine neurodevelopmental disorder or, in part, a product of the modern world. Within hours, parents were sharing the announcement in school WhatsApp groups, and clinicians were already preparing their responses.
This article does not tell you what to think about the documentary before you have seen it. It gives you the grounding to watch it critically — and to know what to do next if you are one of the many thousands of families currently sitting on an NHS waiting list for an ADHD assessment.
The Channel 4 Documentary Dividing NHS Psychiatrists
The Great ADHD Myth?, produced by London-based Minnow Films, does something more careful than its title suggests. Dr Pemberton does not argue that ADHD traits are invented. The documentary asks a harder question: while the traits undeniably exist — the inattention, the impulsivity, the difficulty regulating focus — is the ADHD label always the most accurate explanation for why someone is struggling?
NHS data shows that referrals for ADHD assessment rose by 200% between 2020 and 2025. The documentary hears from a growing number of senior clinicians who believe that the diagnostic net may now be widening faster than the evidence base can support. Their concern is not that ADHD is rare. It is that the condition shares symptoms with anxiety, childhood trauma responses, sleep disorders, and sensory processing differences — and that applying the label without adequately ruling out those alternatives may sometimes prevent people from getting the support they actually need.
The film comes at a moment when NHS waiting lists for ADHD assessments have reached record lengths. In many trusts, children now wait more than 18 months for an initial CAMHS appointment. Adults in some areas wait considerably longer. The question of how to interpret the surge in diagnoses therefore sits inside a system that is, simultaneously, chronically under-resourced.
What the Research Actually Says
The timing of the documentary's announcement matters. In March 2026, researchers at the University of Cambridge published a major paper in the British Journal of Psychiatry — and they reached the opposite conclusion to the one Channel 4's title implies.
After analysing UK-wide prevalence data, the Cambridge team found that ADHD is not over-diagnosed in Britain. It is systematically under-diagnosed. Administrative prevalence — the number of people on record with a formal diagnosis — has grown, yes, but it remains substantially below the estimated true prevalence of ADHD across the UK population. In other words, there are far more people living with undiagnosed ADHD than there are people with diagnoses they should not have.
"The available evidence does not support the claim that ADHD is being over-diagnosed," the authors wrote. "The more pressing concern is unmet need."
One figure from that research deserves to be repeated clearly: on average, an adult woman in the UK waits 11 years from first experiencing significant ADHD symptoms to receiving a formal diagnosis. That number does not describe a system over-diagnosing people. It describes a system where many people — particularly women, who often present with inattentive rather than hyperactive symptoms — spend more than a decade without answers.
The Cambridge paper is not the final word on this debate. No single paper ever is. But it is essential context for any family watching the Channel 4 documentary and wondering whether their referral was the right decision.
The Debate Both Sides Are Partly Getting Wrong
The public conversation around ADHD tends to collapse into a binary. Either the condition is under-recognised and people deserve faster access to diagnosis, or it is over-medicalised and we are pathologising normal human variation. Both camps talk past each other because they are often describing different populations and different problems.
What a health professional will tell you — if you consult one with genuine expertise in neurodevelopmental conditions — is that neither position is useful at the individual level. The question of whether you, or your child, has ADHD cannot be answered by a news headline or a television documentary. It requires a clinical assessment: structured observation, developmental history, collateral information from school or workplace, and careful consideration of whether other explanations fit better.
ADHD also looks very different across different ages, genders, and life circumstances. The hyperactive seven-year-old boy who cannot sit still is not the same presentation as the inattentive adult woman who has spent decades developing coping strategies that mask her difficulties from everyone around her — including her GP. Both may have ADHD. Both deserve a proper evaluation. Earlier this year, the same patterns emerged when ADHD made headlines in a very different context — Dara's Eurovision performance — showing how public perception of the condition continues to shift rapidly.
A Real Scenario: One Family's Fork in the Road
Take the case of a parent — call her Rachel — whose 10-year-old daughter has been struggling at school since Year 3. Her teachers flag persistent inattention during lessons and note that she often seems to be "in her own world." Her reading speed is below the expected level for her age. Rachel's GP referred her daughter to CAMHS in September 2025.
By July 2026, they are still on the waiting list. This is not exceptional. In many NHS trusts, the median wait for a paediatric ADHD assessment now exceeds 18 months. In some areas it is closer to two years from referral to first appointment.
Rachel watches The Great ADHD Myth? when it airs and faces a genuine dilemma. The documentary raises questions she had not previously considered. Should she maintain the referral? Should she pay for a private assessment — which, for a child, typically costs between £800 and £2,000 for a full diagnostic evaluation with a consultant psychiatrist — or wait for the NHS and risk another 12 months of uncertainty?
Here is what the evidence suggests for her specific situation:
- If her daughter's difficulties are primarily ADHD-driven, early intervention matters. Research published over the past two decades has consistently found that untreated ADHD in childhood correlates with measurably lower secondary school attainment, reduced employment stability in adulthood, and significantly higher rates of anxiety and depression by the mid-teens.
- If the inattention is being driven by an anxiety disorder — which is extremely common in girls and often mimics ADHD — an ADHD diagnosis alone will not resolve the problem. Stimulant medication, for instance, can worsen anxiety symptoms. The right treatment depends on the right diagnosis.
- Either way, a competent assessment is not the same as a guaranteed label. A rigorous evaluation by a qualified clinician will not produce an ADHD diagnosis if the evidence does not support one.
The number that matters most for Rachel: a private assessment typically takes 4 to 8 weeks from first appointment to written report, compared to 18+ months on the NHS. The cost is significant and inaccessible for many families. For those who can access it, however, it compresses a multi-year wait into weeks — and the findings, provided the provider meets NICE ADHD diagnostic guidelines, will generally be accepted by her daughter's school for formal SEND (Special Educational Needs and Disabilities) support.
A health expert with experience in paediatric ADHD can help Rachel navigate these trade-offs — advising not just on her daughter's specific presentation, but on which private providers meet UK clinical standards, what questions to ask before committing to a fee, and whether the school's observations are more consistent with ADHD or with another form of need that a different pathway might address more effectively.
What to Do If This Documentary Has Raised Doubts
The Great ADHD Myth? will not settle the scientific debate — and it is not trying to. What it may do is prompt families already on NHS waiting lists to question a decision they made months or years ago under considerable stress.
Here is what that moment of doubt calls for: not less professional guidance, but more.
If you or your child are experiencing persistent symptoms consistent with ADHD — difficulties sustaining attention, managing impulses, or organising everyday tasks in ways that are clearly affecting school, work, or relationships — the appropriate response to a documentary raising questions about diagnosis is not to abandon your referral. It is to speak to a qualified health professional who can evaluate your specific situation with clinical rigour and without an agenda.
ADHD is a real, well-evidenced neurodevelopmental condition, recognised by the National Institute for Health and Care Excellence, the World Health Organisation, and every major psychiatric body in the world. Whether it applies to you is a clinical question. And the answer — whichever direction it goes — is worth having from someone qualified to give it.
Medical disclaimer: This article is for informational purposes only and does not constitute medical advice or a clinical assessment. If you have concerns about ADHD — for yourself or your child — please consult a qualified healthcare professional.
