Ambiguity in reasonable adjustment definitions fuels workplace disputes and delays for disabled employees
A landmark report commissioned by the Cabinet Office’s Disability Unit has illuminated a systemic friction point within the UK’s employment landscape: a pervasive uncertainty regarding what constitutes a “reasonable adjustment” for disabled workers. Published on 11 September, the comprehensive study conducted by the government’s in-house Policy Insights Unit reveals that the inherent flexibility of the Equality Act 2010—while designed to accommodate diverse workplace needs—has inadvertently become a primary source of conflict, contributing to protracted delays and escalating legal disputes.
The research, which synthesized academic findings, organizational data, 66 Employment Tribunal judgments, and insights from 24 Acas conciliators, underscores a critical disconnect between the legal duty placed on employers and the practical, day-to-day application of those requirements. While the legislative framework remains fundamentally sound in its intent, the lack of granular guidance has left both employers and employees navigating a grey area where mismatched expectations frequently stall the support process.
The Legislative Context and the Flexibility Paradox
Under the Equality Act 2010, employers in England, Scotland, and Wales are mandated to implement reasonable adjustments when they are aware, or ought to be aware, that a disabled employee is facing a “substantial disadvantage” in the workplace. The legislation intentionally avoids rigid, prescriptive definitions of what constitutes “reasonable,” opting instead for a broad standard that allows for the consideration of factors such as the employer’s size, financial resources, and the practicality of the proposed adjustment.
However, the Policy Insights Unit report identifies this very flexibility as a double-edged sword. By providing insufficient clarity on the limits of these duties, the law has created an environment where employers fear overextending their resources, while employees may harbor expectations that do not align with the legal definition of feasibility. This structural ambiguity is most visible in the data: in 68 percent of the 66 tribunal cases analyzed, the central dispute revolved around differing expectations regarding the reasonableness of requested adjustments.
A Chronology of Escalating Challenges
The trajectory of this issue has become increasingly complex over the past several years. While the Equality Act provided a framework for inclusion, the modern workplace—transformed by the rapid adoption of hybrid working models and an increased focus on mental health—has introduced new categories of adjustment requests.
- 2021/22: The Access to Work program, which funds essential workplace support, maintained a relatively efficient processing time, with average claim completion occurring within 28 working days.
- 2024/25: The landscape shifted significantly as processing times for Access to Work claims ballooned to 66 working days.
- Present Day: Recent data from the National Audit Office indicates that processing times have surged further to 109 working days. This timeline represents a near four-fold increase in delay, creating a bottleneck that leaves disabled employees without necessary equipment or services for months at a time.
This timeline highlights that while employers often bear the brunt of the criticism for delays, external administrative pressures and underfunded state support mechanisms are significant, if not primary, drivers of the current impasse.
Data Insights: Where the Process Breaks Down
The research offers a stark look at the friction points within the system. Acas conciliators—the professionals on the front lines of employment disputes—reported that 83 percent of their cases involve a fundamental mismatch in expectations between the two parties. Furthermore, 70 percent of these conciliators identified disagreements over the “reasonableness” of an adjustment as the most common catalyst for formal complaints.
The challenge is particularly acute regarding mental health and neurodiversity. Among the tribunal cases examined by the research team, 26 involved individuals with mental impairments. In these instances, 77 percent of cases were characterized by disagreements over the nature of the adjustments, suggesting that employers are far less comfortable or knowledgeable when tasked with managing invisible disabilities compared to physical ones. Common requests—such as modified workloads, quiet spaces, or adjusted communication styles—are frequently met with hesitation, often due to a lack of established internal processes or training for line managers.
Examining the Role of External Delays
Contrary to popular belief, the research found little evidence that employers are acting out of malice or a desire to intentionally disadvantage staff. Only 8 percent of Acas conciliators identified deliberate delay as a factor. Instead, the evidence points to a culture of administrative caution.
Employers frequently seek secondary opinions from occupational health professionals to ensure they are making the correct decision. While this is often a sign of diligence, it acts as a major source of delay. Acas data confirms that 83 percent of conciliators see the pursuit of second opinions as a leading cause of prolonged adjustment processes. When combined with the 58 percent of cases where delays are linked to third-party providers or the slow processing times of the Access to Work scheme, it becomes clear that the system is suffering from a lack of integrated, timely communication between the employer, the employee, and the support services.
Broader Implications for the Workforce
The impact of these delays is not merely administrative; it has real-world consequences for workforce participation. The Trades Union Congress (TUC) 2025 research provides a sobering statistic: while 37 percent of disabled employees have formally requested an adjustment, nearly half of those who did not request one believed they would have benefited from it. This suggests a significant “chilling effect,” where the perceived complexity or hopelessness of the request process deters employees from seeking the support they need to remain productive.
Furthermore, the legal outcomes for those who do reach the tribunal stage are discouraging. Of the cases analyzed, 82 percent of claims for failure to make reasonable adjustments were unsuccessful. While the researchers cautioned that this sample is not necessarily representative of the entire population of requests, it indicates a high threshold for success in legal proceedings, which may further discourage employees from pursuing their rights through the court system.
Recommendations for Systemic Improvement
The conclusion drawn by the Policy Insights Unit is not that the statutory framework is broken, but rather that it is being hampered by a lack of guidance. The researchers argue against a total overhaul of the legislation, which might introduce unnecessary rigidity. Instead, they advocate for a two-pronged approach:
- Enhanced Clarity in Guidance: The government should work to create more accessible, user-friendly documentation that provides examples of reasonable adjustments for various conditions, particularly focusing on mental health and neurodiversity.
- Collaborative Policy Development: Any future changes to the process must be developed in consultation with disabled people who have firsthand experience with the request system, as well as employers from diverse sectors and sizes to ensure the practical viability of the rules.
Conclusion
The findings present a compelling case for reform in how reasonable adjustments are managed across the UK. By addressing the knowledge gaps that currently define the relationship between employer and employee, the government has the opportunity to reduce the volume of unnecessary disputes. As mental health and neurodiversity continue to take center stage in the modern workplace, the ability to facilitate swift, effective adjustments will move from being a legal requirement to a core component of organizational success. Ensuring that both parties have a shared understanding of what constitutes "reasonable" is not only a matter of compliance—it is a critical step toward creating an equitable and inclusive labor market.
