If you manage people, there’s one statistic that should change the way you see your team:
One in five people in the UK are estimated to be neurodivergent.
That means neurodiversity isn’t a niche issue or a new initiative, it’s an everyday reality in your workplace.
In every department meeting, team chat, or one to one, neurodiversity is already in the room.
The question is whether it’s visible, supported, and valued, or quietly masked and misunderstood.
Many organisations still approach neurodiversity as something external: something you “bring in” through inclusive hiring or awareness campaigns. But the truth is simple. Your workforce is already neurodiverse. You just might not know it yet.
Why You Don’t Know Who’s Neurodivergent
There are three main reasons.
Some people don’t know they’re neurodivergent.
Some suspect it, but can’t access a diagnosis.
And others know, but don’t feel psychologically safe enough to say so.
Let’s explore why that is and what it means for employers.
1. Diagnosis Rates Are Rising, But Access Is Failing to Keep Up
In the past decade, diagnosis rates for conditions like autism and ADHD have surged.
That doesn’t mean neurodivergence is “on the rise.” It means people are finally being recognised and given language for how their brains work.
But this surge has also exposed a crisis in the healthcare system.
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More than 200,000 people in England are currently waiting for an autism or ADHD assessment.
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Average waiting times for adults can range from two to seven years, depending on where you live.
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Some local authorities have stopped accepting new referrals entirely due to backlogs.
The NHS itself has described waiting lists as a “ticking time bomb.”
And for many adults, the reality is that diagnosis is completely out of reach unless they can pay for it privately.
Private assessments typically cost between £800 and £1,500, with limited routes for financial support.
That means diagnosis has effectively become a postcode and privilege lottery.
For employers, this creates an invisible problem: you might have dozens of neurodivergent employees who don’t yet know it.
They may be struggling with focus, communication, or time management or quietly excelling through their own systems and routines without ever realising why.
2. Entire Generations Were Missed
If we want to understand why so many neurodivergent adults remain undiagnosed, we need to look back at who was historically included in diagnostic criteria and who wasn’t.
Until 2008, ADHD wasn’t recognised in women under the NICE guidelines.
That means that for decades, women were effectively invisible in research and clinical understanding.
Women and girls often display ADHD differently: more internalised, less disruptive, and often mistaken for anxiety or depression.
As a result, many women grew up feeling “lazy,” “scattered,” or “not good enough,” rather than understanding their brains simply worked differently.
Now, many of those women, in their 30s, 40s and 50s are finally getting diagnosed.
They’re senior leaders, parents, academics, and professionals who are only just realising that their lifelong challenges (and strengths) make sense through a neurodiversity lens.
This is just one example of how bias in research and education has left entire groups out.
The same applies to Black and Asian communities, where underdiagnosis remains high due to cultural stigma, lack of representation, and unconscious bias in clinical settings.
Neurodiversity doesn’t belong to one gender, ethnicity, or age group, it’s everywhere.
But systems and stereotypes have meant that many people have been living with unmet needs for most of their lives.
3. The Numbers You See Are Only Half the Story
Current data shows just how many people are still in the dark:
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Around 15% of UK adults suspect they might be neurodivergent but have never been assessed.
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3% self-identify as neurodivergent without a formal diagnosis.
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The highest rates of undiagnosed neurodivergence are found in people aged 50 and above.
That last figure is especially revealing. Many older workers grew up in a time when neurodiversity simply wasn’t discussed before terms like “ADHD,” “dyspraxia,” or “autism spectrum” were part of mainstream language.
They developed workarounds and coping strategies instead of receiving support.
Now, as awareness grows, many are only just realising that their experiences make sense through a neurodivergent lens but they might not feel comfortable saying so.
4. The Missing Ingredient: Psychological Safety
Even for those who do know they’re neurodivergent, disclosure at work isn’t always easy.
And the biggest barrier isn’t HR paperwork, it’s psychological safety.
Psychological safety means people feel safe to speak up, share ideas, ask questions, and be honest without fear of judgement or negative consequences.
For neurodivergent employees, it’s the difference between thriving and masking.
A 2023 Birkbeck University study found that three-quarters of neurodivergent employees fear being treated differently if they disclose their condition. Over half have seen or experienced discrimination after doing so.
That fear is valid. Many neurodivergent employees have had adjustments refused, feedback delivered harshly, or career progression slowed after disclosure.
So they mask.
They overcompensate.
They spend enormous energy trying to appear “neurotypical” which leads to stress, burnout, and anxiety.
When an organisation lacks psychological safety, people stop being honest about what they need.
And that’s when inclusion efforts fail.
5. Why This Matters for Employers
If one in five employees is neurodivergent, but only a small fraction are disclosing, what does that mean for your business?
It means:
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You’re probably losing talented people because their needs aren’t recognised.
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You may be missing opportunities to make small, low-cost adjustments that dramatically improve performance.
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You could be increasing risk around compliance and wellbeing without realising it.
Neurodiversity isn’t a “nice to have.” It’s a business imperative linked to retention, productivity, risk mitigation and innovation.
Organisations that invest in neuroinclusion see higher employee engagement, better problem-solving and stronger reputations. They attract top talent and build workplaces where people genuinely want to stay.
But to do that, you need to design inclusion around reality, not diagnosis.
6. How to Create a Culture That Works for Everyone
Here’s what forward-thinking employers are doing to build neuroinclusive workplaces — even when they don’t have full visibility of who’s neurodivergent.
1. Start with Awareness and Empathy
Run awareness sessions that explore what neurodiversity actually means in the workplace. At Enna, our Neurodiversity 101 and Neurodiversity for Managers workshops give teams the tools to understand different communication, focus, and processing styles.
The goal isn’t to label it’s to build empathy and flexibility.
2. Build Psychological Safety, Not Just Policy
Psychological safety doesn’t happen through policies; it happens through consistent behaviour.
Encourage managers to model openness, curiosity and humility.
Train them to ask questions like:
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“Is there anything that would help you work more comfortably or effectively?”
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“Would you prefer written instructions or a quick chat?”
These questions normalise difference without putting anyone on the spot.
3. Design for Inclusion by Default
Don’t wait for someone to disclose to make changes.
Offer choice in communication methods, lighting, and meeting styles.
Create quiet zones, offer noise-cancelling headphones, and allow flexible working patterns.
These are low-cost interventions that benefit everyone, not just neurodivergent employees.
4. Review Your Recruitment Process
Many neurodivergent candidates drop out before interview due to inaccessible job adverts or unclear expectations.
Our Recruitment Mini Audit helps organisations spot hidden barriers, from vague language in job descriptions to overly rigid interview formats.
5. Track Inclusion Data – Carefully
Use pulse surveys, feedback forms and anonymous adjustment requests to gauge how supported people feel.
You can also review exit interviews to identify trends.
Even if people don’t disclose during employment, their feedback can reveal whether culture feels inclusive or not.
7. The ROI of Inclusion
When you make inclusion measurable, you make it sustainable.
Tracking neuroinclusion helps you:
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Identify where support is missing
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Reduce turnover and recruitment costs
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Prove compliance with the Equality Act
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Boost engagement and innovation metrics
But beyond the business case, there’s a human one.
Behind every statistic is someone who’s spent years trying to fit in.
Someone who thought they were just “bad with time,” “too forgetful,” or “too sensitive.”
Someone who might finally feel seen, if their workplace made space for difference.
8. Neuroinclusion Is Not About Diagnosis – It’s About Design
A neuroinclusive workplace doesn’t wait for people to come forward.
It’s proactive, not reactive.
It assumes difference exists and designs systems accordingly.
That’s how you reach the employees you don’t know about, the ones that are waiting for a diagnosis, or too cautious to share, or unaware they’re neurodivergent but quietly struggling.
If you build systems with flexibility, empathy, and clarity, you’ll support them all.
Final Thoughts
Every organisation today is neurodiverse whether they realise it or not.
The real question is whether your culture, leadership and systems reflect that reality.
When one in five people processes information differently, inclusion isn’t a side project.
It’s the foundation of how teams communicate, innovate and succeed together.
So, if you’re looking for your next inclusion priority, start here.
Not with labels or tick boxes, but with a genuine curiosity about the brains that already make up your organisation.
Because neurodiversity isn’t new.
It’s just finally being recognised.
How Enna Can Help
At Enna, we help organisations build practical, sustainable neuroinclusion.
Our services include:
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Manager Support Helpline for real-time guidance on adjustments and conversations
If you’re ready to turn awareness into action, we’d love to help you get started.