New research from ACAS (the Advisory, Conciliation and Arbitration Service), conducted in partnership with YouGov, finds that one in three British workplaces has no member of staff with the skills to resolve a workplace conflict before it escalates into a formal procedure. In small and medium-sized organisations, that proportion rises to four in ten. Read alongside CIPD (Chartered Institute of Personnel and Development) data on rising grievance volumes and the imminent expansion of employee rights under the Employment Rights Act 2025, this is a structural gap with measurable financial consequences, not a training-calendar footnote.

The same ACAS/YouGov survey found that more than two in five workers believe workplace conflict is increasing. The pairing is instructive: conflict is trending upward precisely as the in-house capacity to contain it is shown to be thin. For HR teams and for individual employees alike, the gap has direct implications for how disputes are managed, and how much they cost.

What mediation actually is, and why the skills gap matters now

Workplace mediation is an informal, voluntary process facilitated by an impartial third party who helps people in dispute reach a workable agreement. It sits upstream of formal grievance procedures and well upstream of the Employment Tribunal system. When mediation is available and used early, the working relationship frequently survives the dispute. When it is absent, disagreements harden into formal grievances, grievances become tribunal claims, and tribunal claims generate legal costs, management distraction, sickness absence and reputational exposure that can dwarf any training investment.

ACAS early conciliation figures illustrate the volume at stake. Tens of thousands of notifications pass through early conciliation each quarter across England, Scotland and Wales. ACAS data consistently shows that around three-quarters of Employment Tribunal cases notified do not proceed to a full hearing, many of them settled or withdrawn through conciliation. A meaningful proportion of those cases would never have reached the service at all if someone with genuine mediation capability had been closer to the original dispute.

The Employment Rights Act 2025 changes the calculus further. The legislation broadens day-one rights and expands the categories of claim available to employees with shorter service. For any organisation that has not invested in early-intervention capability, the window for informal resolution is narrowing and the cost of missing it is rising. The CIPD's annual Reward Management Survey and its broader people-management benchmarks consistently flag conflict management as an area where employer investment lags far behind stated commitment to employee wellbeing.

For employees: what to do if your workplace cannot resolve conflict

If you work in a smaller organisation, the likelihood that nobody around you has the skills or mandate to mediate is roughly four in ten. The default outcome, when a conflict has no informal exit route, is the formal grievance process: slow, adversarial and rarely capable of repairing a working relationship. Understanding what mediation looks like, and requesting it explicitly and early, can change the outcome of a dispute significantly.

Several practical points are worth holding onto:

• Mediation is voluntary on both sides. You can request it; you cannot be compelled to participate, and neither can the other party. That said, a reasonable request for mediation, refused without good reason, can become a relevant fact in any subsequent formal or legal process.
• Confidentiality is what makes it work. What is said during mediation stays within the process. That protection is the foundation of honest, productive conversation.
• Timing matters considerably. Mediation tends to produce better outcomes when the tension is still manageable, before positions have hardened into formal statements. Asking early is not a sign of weakness; it is a more effective approach.
• If your employer has no internal capability, external mediators are available through private providers, and ACAS itself offers conciliation services once a dispute has moved further along the formal route. The ACAS helpline (0300 123 1100) is a free starting point.

How an employer handles disagreement is a signal worth reading. Patterns tend to be consistent across a team or an organisation, and they surface in employer reviews and in conversations with former colleagues. If the conflict culture in your current workplace gives you genuine cause for concern, that is a legitimate factor in any decision about where to invest your working life next.

For HR leaders: the business case for treating mediation as infrastructure

The ACAS finding that one in three organisations lacks in-house mediation capability is not a benchmark to note and move on from. For HR practitioners in the UK, it is a forecast of where tribunal exposure, sickness-absence costs and voluntary attrition are likely to converge over the next two to three years, particularly as the Employment Rights Act 2025 takes full effect. The Employment Rights Act 1996, the foundational statute on employee rights in Great Britain, already places significant obligations on employers in relation to fair process; the 2025 Act layers additional protections on top of that base.

Three questions are worth putting to your own organisation with some rigour:

1. Who in this business has actually mediated a live conflict to resolution in the last 12 months? Not who holds a certificate from a one-day workshop, but who has sat in a room, managed the dynamic, and reached an agreement both parties held to. If the answer is nobody, that is the capability gap. The CIPD's guidance on internal mediation frameworks provides a practical starting reference for building from that point.
2. Where do conflicts cluster? Most organisations find that a small number of team structures or management relationships generate a disproportionate share of grievances. Mapping that pattern using data already held in your HR system is cheaper and faster than reacting case by case, and it identifies where targeted manager development would have the highest return.
3. What does one Employment Tribunal claim actually cost? Legal representation, management time, any settlement reached, replacement recruitment for the departing employee and the morale cost to the surrounding team routinely add up to a figure that would have funded a credible internal mediation programme several times over. The Acas early conciliation process can cap some of that exposure, but only if the conflict has not already calcified into formal positions.

Building capability proportionately

A 200-person business does not need a full bench of accredited mediators. It needs two or three people who sit outside the direct management chain of most teams, who have been properly trained rather than just briefed, and who have the organisational standing to be called in early without it being treated as an escalation. For larger organisations, a small internal panel combined with a retained external mediator for sensitive or senior-level cases is the pattern that ACAS and CIPD practitioners most commonly recommend.

Line-manager fluency is the cheaper, more scalable layer underneath that panel. Most conflicts surface first as performance concerns, scheduling friction or communication breakdowns. A manager who can hold a structured, non-adversarial conversation, set clear expectations and de-escalate without routing every difficulty to HR is the most cost-effective conflict-prevention mechanism available to any organisation. The CIPD's people-management frameworks and ACAS line-manager toolkits both provide structured guidance for building that capability without heavy external spend.

What the Employment Rights Act 2025 changes in practice

The headline effect of the Employment Rights Act 2025 is broader day-one rights and an expanded set of protected categories that can underpin a tribunal claim. The operational implication for HR is that the period during which informal resolution is both possible and cost-effective is shorter than it was before. Organisations that respond to disputes with slow, process-heavy, defensive HR responses face a regulatory environment that has moved materially against them. Prospect, the trade union representing engineers and technical professionals across sectors including several of the UK's largest employers, has noted that its members are increasingly aware of their rights at an earlier stage of any dispute, a development that makes early-stage resolution capability more rather than less commercially important for employers. Investing in genuine mediation skills now is, in practical terms, reducing a legal and financial risk that is growing by statute.

Key takeaways

• One in three UK workplaces, and 40% of SMEs, lack staff with the skills to resolve workplace conflict at the informal stage, per ACAS/YouGov research.
• More than two in five workers report that conflict at work is rising, at the same moment the Employment Rights Act 2025 raises the cost of leaving disputes unresolved.
• For employees: mediation is voluntary, confidential and most effective when requested early, before the formal grievance procedure begins. ACAS offers free guidance and conciliation services for disputes that have moved further along.
• For HR leaders: mediation capability is workforce infrastructure, not discretionary training spend. A small internal panel, line-manager development and a clear referral route covers the majority of cases. The CIPD and ACAS both publish practical frameworks for building this without large external contracts.
• The Employment Rights Act 2025, layered on top of the Employment Rights Act 1996, narrows the window for informal resolution and raises the financial consequence of missing it. Organisations that build in-house capability now are hedging against a regulatory direction that is not reversing.