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Single Joint Expert

Definition

An expert appointed jointly by the parties and the court, rather than by one side. Common in lower-value UK civil claims under the CPR. The single joint expert owes a duty to both parties and the court, which makes independence even more visible but can create difficulties in adversarial proceedings.

Appointment
Jointly by the parties and the court
Common setting
Lower-value UK civil claims under the CPR
Duty owed to
Both parties and the court equally

Common questions

How does a single joint expert differ from a party-appointed expert?+

A party-appointed expert is instructed and paid by one side and traditionally seen as aligned with that side's case, while a single joint expert is instructed by both parties together and owes an equal duty of independence to each side and to the court.

What difficulty can arise from using a single joint expert in fraud litigation?+

Because only one expert opinion is produced, a party who disagrees has limited scope to obtain a competing analysis without court permission, which can be contentious in complex fraud cases where methodology or interpretation of financial evidence is genuinely disputed.

Related terms

Daubert Standard
The US federal evidentiary standard (Daubert v. Merrell Dow Pharmaceuticals, 1993) requiring that expert testimony be based on scientifically valid methods with...
Expert Report
A written document prepared by the expert before trial or hearing, setting out their qualifications, the materials reviewed, the methodology applied, and...
Frye Standard
The US legal test for admissibility of scientific evidence, originating from Frye v. United States (1923), which required that a technique be...
Hot-Tubbing (Concurrent Evidence)
A procedure, originating in Australia and adopted in some UK and international arbitration proceedings, in which experts from both sides are questioned...
Part 35 (CPR)
Part 35 of the UK Civil Procedure Rules governs expert evidence in civil proceedings in England and Wales. It imposes a codified...

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