The Importance of Clear Instructions

Obtaining a report from a medical expert may appear to be a straightforward process. Typically, the expert is provided with the relevant medical records, supporting factual evidence (often in the form of a witness statement or summary), and a letter of instruction-frequently based on the lawyer's own precedents.

In practice, expert evidence is often the decisive factor in clinical negligence claims. It is, therefore, essential that both the instructions and the resulting report are approached with care, clarity and a proper understanding of the legal context. Where this does not occur, the quality and usefulness of the expert evidence can be significantly undermined.

A well-drafted letter of instruction is critical. It should clearly define:

• the issues to be addressed;
• the scope of the expert's opinion; and
• the assumptions on which that opinion is to be based.

Inadequate or overly generic instructions can lead to confusion or misinterpretation. In some cases, experts may disregard aspects of the instructions-particularly where they are unclear or fall outside the expert's perceived remit. For this reason, experts are entitled to expect clarity and precision from the instructing lawyer at the outset. However, even where instructions are carefully drafted, some experts may still address issues beyond those they have been asked to consider.

Staying within the Appropriate Area of Expertise

If an expert provides an opinion outside their specific field of expertise, this can create significant difficulties in litigation.

By way of example, a general practitioner expert may be instructed to provide an opinion on whether a GP's care fell below an acceptable standard. A separate consultant may then be instructed to address causation and, where appropriate, further issues relating to hospital treatment.

In one such case, a consultant was asked to provide a causation opinion based on a GP expert's finding of negligence, while also addressing the issue of hospital care. However, the consultant went further and, in his report, expressed a contrary view on GP negligence. When asked to revise the report to reflect the original instructions-namely, to proceed on the basis of the GP expert's opinion-the consultant declined. Such a situation creates significant difficulty for the claimant, both in pursuing the claim and in keeping it within the necessary financial budget.

Two important principles arise:

Firstly, courts generally expect evidence concerning breach of duty to come from an expert in the relevant discipline. A judge is likely to prefer the opinion of an appropriately qualified specialist over that of an expert commenting outside their field.

Secondly, experts are expected to follow the instructions they are given when preparing a report. Where they are unable or unwilling to do so, this should be raised at an early stage-and certainly before a report is prepared.

This is not a matter of compromising independence, but of adhering to the established legal framework within which clinical negligence claims are determined.

There may, of course, be circumstances where a broader, preliminary opinion is

appropriate-for example, where no discipline-specific evidence is yet available. Where such a report is required, it should be clearly requested in the letter of instruction and agreed with the expert in advance.

In any event, if an expert has concerns about the evidence put forward by another expert, these can appropriately be raised through discussion with the instructing lawyer.

When Instructions Cannot Be Followed

If an expert considers that they cannot comply with the instructions provided-whether due to lack of expertise, insufficient information, unclear instructions, or professional disagreement-it is important that this is communicated promptly.

Early dialogue allows the instructing solicitor to:

• clarify the scope of the report;
• obtain further evidence if required; or
• seek an alternative expert.

Producing a report that does not reflect the agreed instructions can lead to delay, additional cost and, in some cases, the need to obtain further expert evidence.

Proportionality and the Cost of Reporting

Clinical negligence cases are often investigated before it is clear whether a viable claim exists. At this stage, the prospects of success may justify further enquiry, but remain uncertain. Many such cases are conducted under conditional fee arrangements, supported by legal expenses insurance to cover disbursements such as expert fees.

Although funding arrangements may mean that the client is not personally exposed to these costs, there remains a professional obligation on the lawyer to ensure that expenditure is proportionate.

For experts, this has practical implications. Where, after reviewing the records, the conclusion is that there is no breach of duty or no causal link, a concise report is often sufficient. While experts must:

• consider the records carefully; and
• provide a clear explanation of the opinion reached,

a lengthy and highly detailed analysis is not always required, particularly where the issues are straightforward.

In many cases, experts adopt a proportionate approach by providing shorter reports or letters and adjusting their fees accordingly. This assists not only in managing costs, but also in maintaining constructive working relationships between legal representatives, insurers, and experts.

Dating and Revising Reports

Care is required in relation to the dating of amended reports.

Minor corrections-such as typographical errors or clarifications-may appropriately be made without altering the original date of the report. However, where substantive changes are introduced, the revised report should clearly indicate the date on which it was finalised.

Failure to do so can:

• create confusion;
• reduce transparency; and
• give rise to concerns about the independence of the expert.

Depending on the procedural stage, incorrect dating may also raise issues under the Civil Procedure Rules.

Issues, generally, relating to substantive changes to medical reports merit separate consideration - possibly a subject for a future article.

The Role of Medical Agencies

The use of medical agencies to source and instruct experts is increasingly common. While agencies can be helpful in identifying appropriate specialists, they may also introduce practical challenges.

One commonly encountered difficulty is the limitation on direct communication between the instructing solicitor and the expert. The ability to speak directly with an expert when necessary is often highly beneficial to case management. Effective conduct of a case may depend on the ability to:

• clarify instructions;
• discuss emerging issues; and
• address queries promptly.

Where communication is restricted, this can lead to inefficiencies or misunderstandings.

For this reason, some practitioners prefer to instruct experts directly where possible. However, regardless of the method of instruction, clear and effective communication remains essential.