Seven in ten UK employers have not trained managers on disability discrimination or staff on neurodiversity, according to a VinciWorks poll of 398 HR, legal and compliance professionals. That gap carried reputational cost in 2024. From January 2027, when amendments to the Employment Rights Act remove the compensation cap on ordinary unfair dismissal and cut the qualifying period from two years to six months, the same gap becomes a directly quantifiable balance-sheet exposure for every People team in Great Britain.

The window for remediation is now measured in months. HR functions that have treated manager training as a routine compliance line item, rather than a structured risk-mitigation investment, are the cohort most exposed when uncapped liability attaches to a newly expanded claimant population from the first week of next year.

What the VinciWorks numbers actually show

The headline 71% figure obscures a more granular breakdown for anyone constructing a training business case internally. Within the same survey, 50% of employers report that managers have received no training on disability discrimination, and 57% have given staff no training on neurodiversity at all. A further 35% have delivered neither programme. Half of UK workforces, in other words, are managed by line managers who have received no formal instruction on the single protected characteristic that carries the highest average Employment Tribunal award of any category protected under the Equality Act 2010.

Nick Henderson-Mayo, Head of Compliance at VinciWorks, framed the operational risk in direct terms:

"Seven in ten employers telling us they have not trained managers on disability discrimination or staff on neurodiversity should worry any HR or legal team. Managers are often the front line of requests for reasonable adjustments, and getting these requests wrong can make it far more likely a dispute will end up in front of a tribunal. Plus, disability discrimination already carries the highest average award of any protected characteristic."

The reasonable-adjustments point is the load-bearing one under the Equality Act 2010, specifically the duty at section 20. Line managers, not HR business partners, are typically the first person an employee discloses a diagnosis to, raises a workplace difficulty with, or asks about a change to working patterns. If that manager mishandles the conversation, the employer's defence in any subsequent Employment Tribunal claim is materially weakened from the outset. ACAS (the Advisory, Conciliation and Arbitration Service) publishes detailed guidance on reasonable adjustments and early conciliation pathways, but the practical effectiveness of that guidance depends entirely on whether the manager handling the initial conversation has been trained to apply it.

Why 2027 changes the maths

Two statutory changes convert the current training gap into direct financial exposure within a defined timetable. From 30 October 2026, an "all reasonable steps" standard and a duty to prevent third-party harassment take effect. From January 2027, amendments to the Employment Rights Act drop the qualifying period for ordinary unfair dismissal from two years to six months and remove the compensation cap entirely.

Henderson-Mayo set out what that means for HR planning in practice:

"The Employment Rights Act is about to make all of this considerably more expensive to get wrong. From January 2027, the qualifying period for ordinary unfair dismissal drops from two years to six months, and the compensation cap disappears entirely. Add in the 'all reasonable steps' standard and duty to prevent third party harassment from 30 October 2026, more employees will have more opportunities to bring tribunal claims."

Three strategic implications follow for HR planning. First, the population of employees eligible to bring an ordinary unfair dismissal claim expands dramatically: anyone past six months of service, against the current two-year threshold. Second, removal of the cap shifts the actuarial ceiling on any single claim from a defined statutory maximum to potential lifetime earnings loss plus injury to feelings, a figure that can run to several multiples of annual salary in complex disability cases. Third, the "all reasonable steps" language is precisely the standard Employment Tribunals will apply when assessing whether a training programme was adequate. It is not a quality benchmark to aspire to; it is the legal test that determines whether a defence holds.

The CIPD (Chartered Institute of Personnel and Development), whose annual Reward Management Survey and workforce data carry significant weight with Employment Tribunals assessing what is reasonable sector practice, has consistently highlighted the link between structured manager capability programmes and reduced tribunal exposure. People teams benchmarking their current training completion rates against the 50% and 57% national figures reported by VinciWorks can identify quickly whether they sit above or below the tribunal-risk median for their sector.

The tribunal trend line is already moving

The claim volume shift is not a projected future risk. Tribunal cases linked to neurodivergent conditions such as autism and ADHD nearly doubled between 2020 and 2025, rising from 265 to 517, a 95% increase, with a further 19% rise in the most recent year, per analysis by Irwin Mitchell. Separate analysis by TWM Solicitors shows tribunals involving protected beliefs rose 380% over the same period, from six to 29 cases. Within that belief category, religious belief accounted for 31% of cases in the past year, and gender-critical or transgender-related beliefs for 24%.

Recent case law has sharpened the compliance question considerably. The decisions in Higgs v Farmor's School and For Women Scotland v Scottish Ministers have both tested the extent to which employers can manage lawful beliefs and single-sex spaces in the workplace. For HR functions, the practical implication is that the operational space in which a manager can act on instinct, without training, without a policy reference, without a documented exchange, has narrowed considerably under current judicial interpretation of the Equality Act 2010.

60% of professionals surveyed in the VinciWorks poll already express concern that a clash between employees' religious, political or philosophical beliefs could lead to a discrimination claim. That concern maps directly onto the filing trends above, not onto a hypothetical future scenario.

Whistleblowing: the 2026 change most policies have not yet absorbed

Since 6 April 2026, disclosures relating to sexual harassment have qualified as protected whistleblowing disclosures in their own right. The VinciWorks data shows 43% of employers have not updated their whistleblowing policies or training to reflect this change, and 11% either have no plans to update or operate without a whistleblowing policy or training programme at all.

The operational consequence is precise. A manager who mishandles a sexual harassment disclosure now creates two separate legal exposures: the underlying harassment claim under the Equality Act 2010 section 26, and a whistleblowing detriment claim if the disclosing employee is treated unfavourably afterwards. In firms where managers have received no training on either the pre-existing harassment duties or the April 2026 whistleblowing change, a single mishandled conversation can generate two concurrent tribunal proceedings. Untrained managers are the mechanism by which one incident becomes two claims.

Neurodiversity: intent at board level, capability gap at line-manager layer

Approximately 15% of the UK population, one in seven people, are neurodivergent, per research from the Donaldson Trust. That proportion translates into a substantial share of any employer's active workforce. Research by Commercial Services Group indicates that 70% of employers believe neurodiversity can enhance organisational performance and innovation, 80% would be willing to recruit a neurodivergent individual, and 81% say their organisation is willing to make reasonable workplace adjustments, most commonly flexible working hours or patterns (60%) and additional training or mentoring (59%).

The gap opens at the line-manager layer. 40% of employers believe line managers lack the skills and confidence to support neurodivergent employees effectively, and 45% of respondents say supporting neurodiversity is challenging to implement in practice. Executive intent is high; frontline delivery capability is not.

Kelly Southey, Assistant Director Commercial and Advisory at The Education People, which delivers the Connect to Work programme commissioned by Kent County Council and Medway Council under the UK Government's Get Britain Working initiative, identified the gap between stated commitment and lived reality:

"Most employers now recognise the value and talent neurodivergent people bring, but too many individuals still struggle to get the support they need at work."

Southey added that with most employers expecting neurodiversity and inclusion to grow in strategic importance over the coming years, the priority now is ensuring managers have the training, confidence and guidance to translate good intentions into fair, consistent day-to-day support.

The employment data reinforces the scale of the structural challenge. In 2024/25, 31.4% of people whose main health condition was autism were in employment, against 52.8% of disabled people overall and 82.5% of non-disabled people, per UK Government figures. Laura Davis, Chief Executive of BASE and Inclusive Trading CIC, drew the policy implication clearly:

"At a time when the disability employment gap continues to widen, and people with a learning disability and autistic people remain among the most excluded from the labour market, employers are more important partners than ever. As this gap grows, we cannot afford for inclusion to depend on a manager lottery."

Robert Halfron, Executive Director for Policy, Membership and External Affairs at Make UK, noted that the challenge for businesses creating a neuroinclusive workplace centres on a documented lack of confidence across line managers, even as firms move from awareness to implementation.

What HR should quantify before December 2026

The business case for pre-2027 remediation rests on four figures that HR functions can draw from internal data with minimal analytical overhead:

• Population exposed by the qualifying-period change. Count employees between six months and two years of service. This is the cohort that becomes newly eligible to bring ordinary unfair dismissal claims in January 2027, a population that may be substantially larger than current exposure modelling assumes.
• Manager training completion rate. Specifically on disability discrimination, reasonable adjustments under section 20 of the Equality Act 2010, neurodiversity awareness, and third-party harassment. Benchmark completion against the 50% and 57% national figures from the VinciWorks survey to determine whether the organisation sits above or below the tribunal-risk median.
• Policy currency. The whistleblowing policy should reflect the 6 April 2026 change extending protection to sexual harassment disclosures; the anti-harassment policy should document the steps taken to meet the "all reasonable steps" standard that takes effect 30 October 2026; and the reasonable-adjustments procedure should include a defined decision path for line managers.
• Documented adjustments log. The number of formal reasonable-adjustment requests received, granted, refused, and the documented reason for each refusal. Absence of this record weakens the employer's defence materially, because the tribunal standard requires evidence of process, not merely evidence of intent.

Louise Storie, Head of Connect: Neurodiversity Training, Consultancy and Advisory Service at the Donaldson Trust, described what adequate manager capability looks like in operational terms:

"Managers need the skills to ask the right questions and provide tailored support, rather than guessing what individuals need. When people trust they will receive thoughtful, practical support, they are more likely to be open, leading to more consistent inclusion."

That is also, effectively, the operational description of the conduct a tribunal applying the "all reasonable steps" standard would look for when assessing whether an employer's training programme was adequate. ACAS early conciliation data routinely shows that cases resolved before tribunal hearing carry significantly lower direct cost than those proceeding to a full merits hearing, reinforcing the return on investment calculation for proactive manager development. For People functions building an internal business case for board sign-off before the October 2026 deadline, that cost differential is the most concrete number available.

Key implications for UK HR leaders

• 50% of UK employers have not trained managers on disability discrimination, and 57% have not trained staff on neurodiversity, per the VinciWorks poll of 398 HR, legal and compliance professionals. Disability discrimination carries the highest average award of any protected characteristic in UK Employment Tribunals.
• From January 2027, ordinary unfair dismissal qualifying service drops to six months and the compensation cap is removed under the Employment Rights Act. From 30 October 2026, the "all reasonable steps" standard and duty to prevent third-party harassment take effect.
• Tribunal claims linked to neurodivergent conditions rose 95% between 2020 and 2025, from 265 to 517 cases; belief-related claims rose 380% in the same window, per analysis by Irwin Mitchell and TWM Solicitors respectively.
• 43% of employers have not updated whistleblowing policies since the 6 April 2026 change that brought sexual harassment disclosures within protected whistleblowing coverage.
• The window to remediate manager training programmes, policy documentation and adjustments-log records before the qualifying-period change takes effect closes in roughly four months. For HR functions that have not yet modelled their six-to-twenty-four-month service population against the new claimant eligibility threshold, that modelling is the immediate priority.