Mediator PII · Niche

PI insurance when acting as a UK mediator

Reviewed by Matthew Bartlett, Director, Apex Insurance Brokers Limited (FCA FRN 724952) · Published 14 July 2026

Unlike arbitrators, UK mediators are not protected by statutory immunity. Mediator claims are relatively rare but the exposure is real — failure to disclose conflicts, breach of confidentiality, negligent facilitation. This page maps how PI cover responds.

No statutory immunity

  1. UK mediators have no equivalent of the Arbitration Act 1996 section 29 immunity.
  2. Contractual mediation-agreement provisions typically include limitation of liability, disclaimers and immunity-style undertakings from parties, but these are contractual, not statutory.
  3. Enforceability varies — UCTA 1977 and reasonableness apply.
  4. Institutional rules (CEDR, CIArb, LawWorks, IMI) reinforce contractual protections but do not create statutory immunity.

Claim triggers

  1. Breach of confidentiality. Mediator inadvertently discloses information from one party to another, or to a third party.
  2. Conflict of interest. Mediator's undisclosed prior relationship with a party.
  3. Negligent facilitation. Party alleges the mediator's conduct led to an unfair outcome.
  4. Enforcement issues. Settlement agreement structure challenged post-mediation.
  5. Regulatory or institutional discipline. Complaint to CEDR, CIArb, IMI or other mediation body.

Cover for mediators

  1. Standalone mediator PI is available in specialist markets.
  2. Extension of underlying professional PI where the mediator is also a lawyer, accountant, therapist or other professional.
  3. Institutional cover where the mediator is on an accredited panel.
  4. Cover limit typically £250k-£2m per claim; higher for commercial or family mediation with high-value matters.

Common wordings and extensions

  1. Standard professional PI wording adjusted to include mediation as a covered activity.
  2. Confidentiality-breach cover with adequate limit.
  3. Institutional-body-defence cover for complaints to CEDR, CIArb, IMI.
  4. Family mediation specific extensions where matters are highly sensitive.
  5. Commercial mediation extensions where deal values are material.

Getting cover in place

  1. Confirm whether underlying professional PI extends to mediation activity.
  2. Where standalone cover is needed, engage specialist broker.
  3. Institutional accreditation (CEDR, CIArb, IMI, FMA) supports underwriting.
  4. Ad hoc mediation appointments — individual cover essential.
  5. Family mediation — discuss with Family Mediation Council-linked broker where possible.

Practical steps

  1. Written mediation agreement with clear scope, confidentiality, limitation of liability provisions.
  2. Conflict-of-interest disclosure protocol at engagement.
  3. CPD compliance with accreditation body.
  4. Complaint-handling procedure documented.
  5. Regular institutional accreditation renewal.

Frequently asked

Do UK mediators have statutory immunity from claims?
No. Unlike arbitrators (Arbitration Act 1996 s.29), UK mediators have no statutory immunity. Contractual limitations in the mediation agreement provide the primary protection.
Are mediator claims common in the UK?
Relatively rare compared to lawyer, accountant or IFA claims. But the exposure is real — confidentiality breaches, conflict-of-interest allegations, and negligent-facilitation challenges do arise.
Do I need standalone mediator PI or does my professional firm's cover extend?
Depends on the underlying policy. Many professional firm PI wordings extend to mediation activity where the mediator is also a practising professional. Confirm explicitly.
What limit should a UK mediator hold?
£250k-£2m per claim is common. Commercial mediation and family mediation with high-asset matters attract higher limits. Institutional accreditation panels may suggest specific minimums.
Does CEDR or CIArb provide cover for accredited mediators?
Institutional cover varies. Some accreditation panels provide baseline cover; some don't. Check the specific panel arrangements.
What is the biggest risk in family mediation from a PI perspective?
Confidentiality-breach allegations and complex-family-dynamics claims. Higher emotional register than commercial mediation. Standard commercial mediation PI may or may not extend adequately to family work.
Do I need Public Liability as well as PI as a mediator?
PL is essential if you mediate in person at venues — slip-and-fall exposure. Often bundled with mediator PI in specialist policies.
What about online mediation (Zoom etc)?
Standard PI covers online-delivered mediation. Cyber cover separately addresses data-breach and platform-related exposures — consider adding if handling sensitive material online.

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