Overriding Duty to the Court
Definition
The principle in English and Welsh law, codified in the Criminal Procedure Rules and the Civil Procedure Rules, that an expert witness owes a higher duty to the court than to the instructing party. The expert must assist the court impartially and must not act as an advocate.
- Jurisdiction
- England and Wales
- Codified in
- Criminal Procedure Rules, Civil Procedure Rules
- Core principle
- Duty to the court outweighs duty to the instructing party
- Prohibits
- Acting as an advocate for one side
Common questions
What happens if an expert witness breaches the overriding duty to the court?+
The court can disregard or give reduced weight to the expert's evidence, and repeated or serious breaches can lead to the expert being reported to their professional body or barred from giving evidence in future cases.
Does this duty mean the expert cannot be paid by one party?+
No, experts are routinely instructed and paid by one side, but payment must not affect the content of their opinion. The rules require the expert to state their opinion is independent of the pressures of the litigation, regardless of who is paying.
Related terms
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- Concurrent Evidence
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- Cross-Examination
- Questioning of a witness by the opposing party. For an expert, cross-examination probes qualifications, methodology, the basis of opinions, limitations, inconsistencies with...
- Examination-in-Chief
- The questioning of a witness by the party who called them. For an expert, this is typically limited because the substance is...
- Expert Witness
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- Gatekeeping (Daubert)
- The duty of a US federal trial judge under Federal Rule of Evidence 702 and the Daubert line of cases to assess...
- Opinion Evidence
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- Section 45, Bharatiya Sakshya Adhiniyam 2023
- The Indian statutory provision permitting courts to consider the opinion of persons specially skilled in foreign law, science, art, handwriting, or finger...
- Ultimate Issue
- The central question the court must decide: guilty or not guilty, liable or not liable. Traditionally experts were prohibited from expressing opinions...
- Ultimate-Issue Rule
- The traditional prohibition on an expert stating an opinion on the very factual question the court must decide, on the ground that...
Explained in these topics
- Opinion Evidence and Its Limits
- The Expert Witness: Role, Duties and TestimonyThe principle, codified in procedural rules in many adversarial jurisdictions, that the expert's primary obligation is to assist the court with independent, ob...