Medical Expert Witness in the Courtroom: What It’s Really Like

Ever fancied being a clinical Sherlock Holmes? Welcome to the courtroom.

Medical experts are qualified healthcare professionals who provide independent and unbiased opinions in legal cases which involve complex medical issues. Whether it’s a question of misdiagnosis, evaluating treatment decisions or explaining the cause of an injury, the courts turn to medical experts to make sense of clinical facts.

Contrary to popular belief, being an expert witness isn’t a separate identity from your day-to-day job. Your expertise comes from your real-world clinical experiences in healthcare. However it does demand time for detailed review, and skills such as critical thinking and being able to articulate your medical opinion in a succinct way.

In this article, we’ll explore what this role involves, how to get started, and why more medics have found this role as a rewarding way to use their skills differently.

🧐What Does the Role Actually Involve?

When thinking about becoming a medical expert witness, it’s important to understand who you’ll be working with. Typically, you’ll be contacted by a solicitor acting on behalf of either the claimant or the defendant. The claimant is usually the patient (or their family) who alleges that harm was caused. The defendant is often an NHS Trust or private healthcare provider defending the care given.

The solicitor’s role is to guide the legal case – and to instruct you, the medical expert. You’ll be sent a ‘letter of instruction,’ which outlines what you’re being asked to do. This might include questions like:

Was the standard of care acceptable?
Did a delay in treatment contribute to the outcome?

Think of it this way: you’re not being asked to give a general opinion on the whole case. Instead, you’re asked to comment on specific medical issues relevant to the legal question – such as the diagnosis, treatment, prognosis, or causation.

📄Reviewing the Case

Once you accept the instruction, your next task is to read and analyse the case materials. This involves reviewing large volumes of clinical records, correspondence, investigation results, and timelines. This role requires a genuine interest in working through detailed documentation and clinical nuance. If you don’t enjoy digging through clinical detail, this probably isn’t the job for you.

🖋️Writing the Expert Report

Writing the report is the core part of being an expert witness. This is where you present your independent medical opinion based on the evidence. A good report helps the court understand what happened medically and answers the specific legal questions with detailed analysis, not just a summary or conclusion.

👥Conferences and Case Meetings

Once your report is submitted, you may be invited to a conference with the legal team. This often involves discussing the strengths of your report, clarifying concerns, or exploring wider implications with the instructing solicitor and possibly the doctor under investigation.

Sometimes, these discussions can be difficult. You may have to explain clinical failings to another doctor; not always easy, but often appreciated. After weeks of only hearing from lawyers, many doctors find it helpful to talk to a fellow clinician who understands the clinical context; you can explain your rationale to them, and they will appreciate this.

You may also take part in a joint expert meeting, where you sit down with the opposing expert (e.g. the defendant and claimant experts) to discuss points of agreement and disagreement. The aim is to narrow down areas of dispute. This is often one of the most intellectually challenging yet rewarding parts of the role.

👨🏻‍⚖️Going to Court

Although relatively rare, some cases go to trial. If they do, you may be called to give evidence in court. This involves being cross-examined by barristers, whose job is to challenge your report and test your credibility.

This can be intense. You’ll need to stay calm, think clearly under pressure, and explain your reasoning confidently. It can feel like the most intimidating stage, and the most daunting for some, however it is also an opportunity for you to demonstrate the depth of your knowledge and strength of your reasoning.

🤔Types of Legal Proceedings

It is important to be aware of different types of legal proceedings you may be involved in as a medical expert.

Legal Setting	Purpose	Legal Threshold	Your Focus as Expert
Civil Litigation	Compensation for harm	Balance of probabilities	Standard of care + causation
Criminal Trial	Criminal responsibility	Beyond reasonable doubt	Gross negligence or recklessness
Coroner’s Inquest	Understand how someone died	None (fact-finding only)	Contributing factors, timeline of care
GMC/Tribunal	Disciplinary/regulatory action	Professional standards	Fitness to practise, risk to patients

📒What Skills and Training Do You Need?

There is no strict legal requirement to complete a course to act as an expert witness in the UK but in practice, training is strongly expected and often essential to get work.

As mentioned, a core part of this role is writing expert reports; it’s the foundation of what you do. You have to actually want to write reports! Being clear and persuasive in both writing and speech is an important skill for this work. Introductory courses, such as Bond Solon’s Excellence in Report Writing, can help you learn how to structure reports effectively and meet professional standards.

Bond Solon is a leading UK provider of expert witness training, widely used by doctors entering medico-legal work. Its Excellence in Report Writing course is typically a short 1–2 day programme that teaches how to structure reports, meet legal standards, and write clearly and defensibly. The course includes practical exercises with feedback and is usually delivered as a live online session, with occasional in-person workshops available.

Although there is no formal legal requirement to complete training, it’s highly recommended. As doctors, we rarely receive much exposure to legal language or courtroom procedures during our training, which can leave us underprepared. If you want to be taken seriously in this field, training becomes essential.

For example, when writing reports for civil cases, solicitors are required to guide you under Civil Procedure Rules Part 35, a key legal framework that governs how expert evidence must be presented in court. Even if you’re a brilliant clinician, you may be unfamiliar with what the legal system expects: how to format your report, what declarations are required, and what your duty to the court entails. While solicitors can guide you, the responsibility for compliance lies with you.

Medico-legal conferences, such as those run by the BMA or specialty societies, offer a helpful introduction to legal processes. Some doctors choose to go further; pursuing formal qualifications or gaining experience through internships or mentoring with experienced expert witnesses. Popular options include the Cardiff University–Bond Solon Expert Witness Certificate, postgraduate study such as an LLM in Medical Law and Ethics, or specialist medico-legal training courses, all of which remain current and widely recognised.

💬Q&A with Dr Clarence Liu

Dr Clarence Liu is a consultant neurologist. Alongside his clinical work, he is a medical expert witness, during which he uses his medical expertise to provide medico-legal advice in a range of legal proceedings. He shares his invaluable insights and experience in the following Q&A.

❓Question 1: What is the process of becoming an expert witness?

I was approached by several lawyers to become an expert witness due to my area of specialism, but I know that some doctors directly contact lawyers or the relevant agencies to become an expert witness. There is some basic training but so far there is nothing compulsory from a regulatory standpoint.

In terms of skills, firstly the expert witness needs to be an acknowledged specialist with sufficient and wide ranging experience in the relevant field, and secondly it is important to know your duty is to the Court, rather than the instructing solicitor (who may act for the claimant or the defendant). You need to be a substantive consultant and be in practice with substantial experience in your specialty area to become an expert witness.

❓Question 2: Which medical specialties are most in demand in the courtroom?

You need to speak to the lawyers for detail. In general most cases do not end up in the courtroom as they are settled: the UK Court system is adversary so usually there are 2 similar experts on either side i.e. claimant versus defendant, and you arrange a joint discussion with your counterpart and submit your joint statement. Often the cases are then settled, but of course in some cases they end up in Court and require cross examination. Clinical negligence cases seem to end up in Court more often than personal injury cases.

❓Question 3: Why did you decide to become an expert witness?

I was asked a few times by several solicitors and then went into it. One appealing aspect is that you get to see all the details regarding a patient as you need to go through all the records and reports, in some ways it is not dissimilar to writing a case report. One does get adequately reimbursed if you make sure the lawyers have agreed to your terms and conditions.

❓Question 4: What are the negatives / hardest things about being an expert witness?

This role is not well suited to doctors who do not like going through bundles of records, and often the materials do not arrive until very late. The Court has specific deadlines so it is vital you keep to them. It’s not good for doctors who tend to be late with letters or correspondence.

❓Question 5: What advice would you have for a medical student or doctor in the early stages of their career who is considering becoming an expert witness?

As an expert witness, you do need to ringfence time because the job is rather paperwork heavy. So my advice for anyone considering becoming an expert witness is: sleep on it until you’re an established consultant or GP.

💭Final Thoughts – Is This For You?

Common myths about expert work are that you will go along with whatever your solicitor says since you are being paid by them, or perhaps you are more likely to side with a doctor as a medic. Remember you are not there to side with one party, your duty is always to the court!

Being an expert witness encourages defensible practise, improved documentation and a greater self-awareness. Controversially it can also make you very defensible in the way you practise medicine by continually seeing what can go wrong.

It’s not for everyone, you must enjoy analytical thinking, writing and being challenged. When done right, it is respected work that supports both patients and clinicians. The vast majority of work can be done in your own time around other life pressures, such as family, kids and pets.

If this is something that interests you, I would suggest a few next steps:

Attend a taster conference– for example, the Bond Solon Annual Expert Witness Conference in November, the BMA Medico-Legal Conference, or a meeting of the Society of Expert Witnesses. These events are a great way to hear directly from experienced experts, lawyers, and judges.