By Ben Kerrigan-
The Wes Streeting-led government in the United Kingdom has launched a major clinical review into the sharp rise in diagnoses of mental health conditions, neurodevelopment disorders such as Attention Deficit Hyperactivity Disorder (ADHD) and Autism Spectrum Disorder (ASD).
The review, commissioned as the number of sickness and incapacity benefit claims continues to rise, seeks to determine whether increasing social and economic pressure has led to genuine increases in mental illness or whether “normal emotional experiences” are being over-pathologised.
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Officials emphasise that the exercise is rooted in “strictly clinical” assessment, but critics warn it risks undermining support for vulnerable people at a time when demand for care far outstrips supply.
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The review was formally announced in early December 2025, with public disclosure that mental health, ADHD and autism diagnoses will all be scrutinised.
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It comes amid a dramatic rise in claims for sickness or incapacity benefits: 4.4 million working-age adults in England and Wales now receive such support, up by 1.2 million since 2019. A sharp increase has been particularly noted among 16- to 34-year-olds citing long-term mental health conditions.
Health Secretary Streeting has spoken of concern that patterns in diagnoses may have shifted that feelings once considered within the spectrum of everyday stress, grief or restlessness might now be often classified as clinical disorders.
His aim is to bring clarity and an evidence-based reassessment of diagnostic thresholds, treatment pathways and benefit access.
The review will be chaired by Peter Fonagy, a clinical psychologist from University College London, with former psychiatry leader Simon Wessely as vice-chair..
Their remit includes evaluating demand drivers and systemic pressures, while consulting researchers, clinicians and people with lived experience within mental health and neurodivergent communities.
The review arrives at a time when national systems already acknowledge the strain inflicted by surging numbers seeking neurodevelopmental diagnosis and support.
Earlier in 2025 the ADHD Taskforce convened by NHS England published a report highlighting long waiting lists, regional inequalities and a two-tier system in which only those able to afford private assessments get timely access. Many patients require months or years on waiting lists before receiving assessments, diagnosis or treatment.
Psychiatrists have drawn attention to the overload: in some regions, waiting times for neurodevelopmental assessment have increased dramatically, and children and adults alike face delays extending several years. Services originally intended for severe cases now deal with demand that far outstrips capacity.
Advocates warn that the strain hits not just those with ADHD or autism, but also individuals with other serious mental illnesses whose care may be delayed or deprioritised.
Government supporters frame the review as part of broader welfare reform under Labour Party leadership an overhaul intended to relieve long-term dependency, reduce welfare costs, and ensure that support is directed to those with genuine, clinically verified conditions.
Streeting argues the review is necessary to restore trust in diagnosis and support systems and to ensure that welfare policy remains sustainable.
Potential Impacts: Diagnosis, Support, and Debate Over Over-pathologisation
Proponents of the review present it as a chance to press pause and recalibrate systems under pressure. The aim, they say, is not to stigmatise those with mental illness or neurodivergence but to ensure that support is rooted in robust clinical evidence protecting the most vulnerable and preventing misuse of diagnoses in ways that might undermine long-term welfare integrity.
Streeting has framed the review as evidence-based, insisting that only a careful clinical lens can disentangle “what we know, what we don’t know, and what these patterns tell us about our mental-health system.”
Health-service planners also hope the review will help address systemic imbalance: decades of under-resourcing, workforce shortages, uneven access to specialist services and growing backlogs in mental-health and neurodivergent care.
If successful, a clearer policy framework could underpin improved training for general practitioners (GPs), more equitable diagnostic pathways, and faster access to support across all regions.
However, critics warn that casting doubt over diagnoses risks disenfranchising people whose conditions may already be poorly understood or under-treated. Mental health charities have cautioned against conflating normal emotional distress with illness, and raised concerns that the review could become a pretext for tightening criteria, reducing access to services or withholding benefits from people in genuine need.
Recent remarks by experts have pointed out that sweeping reductions or delays in access may push some toward crisis before help is granted.
Supporters of existing services argue that the rise in diagnoses reflects not over-pathologisation but increased awareness, reduced stigma, and improved recognition of complex mental health and neurodevelopmental conditions.
According to the ADHD Taskforce’s 2025 report, untreated ADHD alone is estimated to cost the UK economy up to £17 billion annually, due to lost productivity, reliance on social support, and higher demand on health and justice services.
With timely diagnosis and support, many individuals with ADHD and other conditions can lead productive lives contributing to society rather than being excluded from it.
There is also fear that the new review could deepen inequalities, if it results in greater reliance on private providers, longer NHS wait lists, or increased bureaucratic hurdles. Already, under the current system, people able to pay can access diagnosis faster than those dependent on public services effectively creating a two-tier system of neurodevelopmental care.
Public attitudes and political fallout may prove as consequential as clinical outcomes. The debate touches on some of society’s most sensitive issues: how to define illness, when to intervene, what constitutes genuine disability, and how to balance individual need against collective welfare budgets.
In context of rising economic pressures, inflation and housing crisis, many families and individuals depend heavily on disability support and uncertainty over what counts could create real hardship.
The review is due to report its findings in summer 2026. Depending on its conclusions, it could reshape provision of mental-health and neurodivergent services, redefine diagnostic criteria, influence benefit eligibility, and affect employment support for millions.
Equally, it may restore credibility to overburdened systems, lead to better-resourced care, and ensure that diagnoses reflect real clinical need rather than administrative convenience.
At this pivotal moment, the outcome of the review may influence not just policy, but public understanding of mental illness, neurodivergence and disability and could shape the lives of many whose conditions do not fit neatly into long-established categories.
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