Jurisdiction(s):
United Kingdom

Key definition

Single joint expert definition

What does Single joint expert mean? An independent expert jointly instructed by opposing parties to give opinion evidence on a disputed technical or valuation issue in court or tribunal proceedings. Common in civil litigation and family cases. The court may direct that evidence be given by a single joint expert (expressly provided for in the Civil Procedure Rules and Family Procedure Rules in England and Wales), with similar practice encouraged in Scotland and Northern Ireland; in Ireland the approach is used by agreement and case management though terminology varies. The expert owes an overriding duty to the court, not to the parties. One report is prepared...

Precedent letter instructing a single joint expert with drafting notes and CPR 35/PD 35 guidance for civil claims (England and Wales)

Published by a LexisNexis Dispute Resolution expert

Precedents

Private & confidential

[ insert name and address of expert ]
[ insert date ]

Dear [ insert name of expert ]

[ insert case heading ]

Instruction to ACT as Single joint expert

Thank you for confirming your appointment as the expert witness in this matter. You will be instructed as a single joint expert.

We act for [ insert name of Client ], who is [ bringing OR defending ] a Claim against [ insert name of opposing party/parties ]. This correspondence has been countersigned by the solicitors for [ insert name of party/parties ] to confirm their agreement to the terms set out in this letter.

The purpose of this instruction is to supply the factual context of the dispute, refer you to the principal documents, and set out the issues for your consideration, as outlined below:

The factual background to the dispute
The key documents relevant to your task
The issues you are required to consider

As an expert witness, you will be aware of the requirement to comply with your duties and to ensure that the appropriate procedures are followed throughout your involvement...

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Web page updated on 22/05/2026

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