01/04/2026
Over the past few decades, diagnoses of ADHD and autism in children have risen sharply in England — but the key question is: has the prevalence actually increased, or are we just getting better at recognising it?
Research has long suggested that around **5% of children have ADHD**, and somewhere between **3–6% may be autistic**. That hasn’t changed dramatically. What has changed is diagnosis.
40 years ago, in the 1980s, **over 90% of children with these conditions were likely never diagnosed**. Only the most severe cases were recognised. Many others were labelled as “disruptive”, “difficult”, or “shy” — and their needs were misunderstood or unsupported.
The consequences of that were huge.
Children with unmet needs were more likely to struggle in school, face exclusion, and develop low self-esteem. Many experienced long-term mental health challenges like anxiety and depression — not because of the condition itself, but because they weren’t understood or supported properly. Over time, this has been linked to poorer employment outcomes and wider social disadvantage.
Today, things have improved — but not perfectly.
Out of roughly 9 million children in education in England:
• Around **450,000 are likely to have ADHD — with ~150,000 still undiagnosed**
• Between **300,000–500,000 may be autistic — with a significant number still unrecognised**
So while diagnoses are rising, this is largely a shift from **invisible → visible**, not a sudden surge in conditions.
At the same time, there’s a real issue in how support is structured. In many cases, children need a formal diagnosis to access help in school — which creates pressure on families to pursue labels.
So the reality is more complex than headlines suggest.
This isn’t simply about “overdiagnosis” or “underdiagnosis” — it’s about a system still catching up after decades of missed need.
We’re not seeing more children with these conditions. And many children have both diagnoses so there is an overlap.cWe’re finally starting to see the ones who were always there.
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