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CPR Part 35 for capacity reports
Whats on this page
CPR Part 35 is central to solicitor-facing and court-facing expert work because it shapes how expert evidence is instructed, presented and scrutinised. CPR Part 35 for capacity reports therefore matters for any mental capacity report that may be used in contested proceedings or where independence, methodology and report structure are likely to be tested carefully.
What CPR Part 35 is for
CPR Part 35 governs expert evidence in civil proceedings and sets out the framework for when expert evidence is used, how experts are instructed and what duties they owe. It matters because capacity evidence may be scrutinised not just for its conclusion but for its procedural and methodological integrity.
Why it matters in capacity work
Capacity reports used in litigation or contested proceedings often need more than good clinical or social-work practice. They also need to show independence, proper scope and a report structure that fits the expectations placed on expert evidence.
The expert’s duty to the court
Part 35 and the accompanying practice direction make clear that the expert’s duty is to the court rather than to the party paying for the report. This is especially important in mental capacity cases, where one side may hope the expert will answer a disputed question in a particular way.
What instructing solicitors should provide
Solicitors should usually define the issues clearly, provide the necessary documents and make sure the expert understands the proceedings as a whole. Poorly framed instructions can weaken even a competent expert opinion.
What a Part 35-compliant report usually contains
A stronger report will usually make clear the expert’s qualifications, the materials reviewed, the issues addressed, the factual assumptions relied on and the reasoning behind the opinion. Transparency of method is as important as the conclusion itself.
Where capacity reports often go wrong
Problems often arise when a report is written as though it were only a clinical note or internal memo, when the issues in dispute are not defined precisely, or when the reasoning is too thin to withstand adversarial scrutiny.
Why independence and methodology matter
The more contested the case, the more important it becomes that the report can show disciplined method and genuine independence. A report that looks outcome-driven often loses force even if the underlying concern was legitimate.
How CPR Part 35 relates to other frameworks
CPR Part 35 does not replace the Mental Capacity Act 2005. Rather, it sits alongside it in litigation contexts. The capacity test remains the same, but the evidential expectations around the report are usually higher.
What strong practice looks like
Strong practice usually combines clear issue-framing, transparent expert reasoning, proper declaration of duties and a report structure that allows the court to see exactly how the expert moved from evidence to conclusion.
Frequently asked questions
Does CPR Part 35 apply to every capacity report?
No. It matters most in litigation or other contexts where expert evidence duties and structure are directly engaged.
Why does the expert’s duty matter?
Because the expert’s primary duty is to the court, not to the party paying for the report.
Can a clinically sensible report still be weak under Part 35?
Yes. A report may be clinically sensible but still lack the structure, transparency or independence expected of expert evidence.
Related pages and services
These related pages connect this guide to the wider shared authority guides pathway.
Need to connect this authority page to a decision-specific issue?
Use the related pages below to move from the legal or procedural framework into the decision-specific guides and assessment pathways that apply it in practice.