What Is Medical Negligence? A Complete UK Guide to Making a Claim

What is medical negligence?

Medical negligence — also known as clinical negligence in the UK — is a specific legal claim that arises when a healthcare professional breaches their duty of care to a patient and that breach causes harm. It is not the same as an unfortunate medical outcome, a complication, or a difference in opinion. To qualify as negligence in law, the standard of care provided must fall below what a competent professional in the same field would reasonably have offered.

The legal test in England and Wales comes from two cases: Bolam v Friern Hospital Management Committee (1957) and Bolitho v City and Hackney Health Authority (1997). Together they establish that a doctor is not negligent if their actions are supported by a responsible body of medical opinion, provided that opinion withstands logical scrutiny. In Scotland, the equivalent principles apply through Hunter v Hanley (1955).

In simple terms: not every poor outcome is negligence, but every act of negligence that causes you avoidable harm gives you the right to seek compensation. The job of a medical negligence solicitor is to determine, with the support of independent medical experts, whether your case crosses that legal threshold.

Who can be held liable for medical negligence?

Almost any healthcare professional or institution can be the subject of a medical negligence claim if they fall below the expected standard and cause harm. In practice, the most common defendants in UK medical negligence cases are:

• NHS trusts — for hospital treatment, A&E care, surgical errors, and inpatient stays. Claims are administered by NHS Resolution.
• GPs — both NHS and private, for misdiagnosis, prescribing errors, or failing to refer.
• Private hospitals and clinics — for elective surgery, cosmetic procedures, and private consultations.
• Dentists — for substandard treatment, failures to diagnose oral cancers, or extraction errors.
• Midwives and obstetricians — for birth injuries to mothers or babies.
• Specialist consultants, anaesthetists, and surgeons — when their individual conduct breaches the standard of care.
• Pharmacists — for dispensing errors that cause patient harm.
• Care homes and community nursing services — for pressure sores, falls, and inadequate care.

Importantly, you generally do not sue an individual GP or doctor directly. NHS claims go to the trust or NHS Resolution. Private doctors are usually defended by their medical defence organisation — most commonly the Medical Defence Union (MDU) or Medical Protection Society (MPS). Your solicitor handles all of this on your behalf; you do not need to confront the person you believe was responsible.

The four elements you must prove in a medical negligence claim

Every successful medical negligence claim in the UK rests on proving four specific elements. If any one of these is missing, the claim will not succeed — no matter how distressing the circumstances:

1. Duty of care

There must be a recognised relationship between the patient and the healthcare provider. This is almost always automatic where treatment was provided — a doctor seeing a patient, a hospital admitting someone, a midwife at a birth all owe a duty of care. Duty of care is rarely the sticking point in modern claims.

2. Breach of duty

The healthcare provider must have failed to act as a reasonably competent professional in their field would have done. This is judged using the Bolam/Bolitho test — would a responsible body of fellow professionals have done the same thing? An independent medical expert in the same speciality reviews the records and gives an opinion. This is usually the most contested part of any claim.

3. Causation

The breach of duty must have actually caused — or materially contributed to — your injury. Causation is often harder to prove than breach. A doctor may have made a mistake, but if the outcome would have been the same regardless, the claim fails. This is why early specialist advice matters: a solicitor experienced in medical negligence can spot causation issues before significant time and money are committed.

4. Damages (harm)

You must have suffered measurable harm — physical, psychological, or financial — as a result. UK law does not compensate for near-misses, however worrying. The harm can be physical injury, worsened illness, additional treatment required, lost income, ongoing care needs, or a recognised psychiatric injury such as PTSD.

Common types of medical negligence claims

Medical negligence covers a wide range of healthcare failings. The most common categories of UK claim — each with their own complexities — are:

• Misdiagnosis and delayed diagnosis — particularly cancer, sepsis, heart attacks, and strokes. The most common single category of UK medical negligence claim.
• Birth injuries — including cerebral palsy, Erb’s palsy, hypoxic brain injury, and maternal injuries during childbirth.
• Surgical errors — wrong-site surgery, retained instruments, anaesthetic complications, and inadequate post-operative care.
• A&E errors — triage failures, missed sepsis, missed cardiac events, and discharge mistakes.
• GP negligence — failure to refer, missed cancers at primary care level, prescribing errors, and inadequate examinations.
• Medication and prescribing errors — wrong drug, wrong dose, failing to check interactions.
• Dental negligence — failed root canals, missed oral cancers, nerve damage, and extraction errors.
• Cosmetic surgery negligence — particularly relevant given the unregulated nature of much of the sector.

If your concern doesn’t fit neatly into one of these categories, that doesn’t mean you don’t have a claim. Medical negligence is defined by the breach and the harm it caused — not by the label attached to it. A solicitor will assess the specifics of your case during a free initial review.

How long do I have to make a medical negligence claim in the UK?

Under the Limitation Act 1980, the standard time limit for medical negligence claims in England and Wales is three years. Scotland and Northern Ireland follow similar rules. The three-year clock starts from the later of:

• The date the negligent act or omission occurred, or
• The date you first knew (or should reasonably have known) that the harm you suffered was caused by negligent treatment — known in law as the ‘date of knowledge’.

The ‘date of knowledge’ rule matters because in many cases — particularly cancer misdiagnosis or delayed diagnosis — patients only realise something went wrong months or years after the original treatment. The clock starts when you connected the harm to potential negligence, not on the day of the original visit.

Important exceptions to the three-year limit

• Children — the three-year clock does not start until the child’s 18th birthday. They have until age 21 to bring their own claim.
• Mental capacity — if the injured person lacks legal capacity (for example due to a brain injury), the time limit does not run while they remain incapacitated.
• Fatal claims — where someone dies as a result of negligence, the dependants have three years from the date of death (or from their date of knowledge) to claim under the Fatal Accidents Act 1976.
• Court discretion — in exceptional circumstances, courts may extend the time limit under section 33 of the Limitation Act, but this is never guaranteed.

If you suspect negligence, do not delay. Even if you think you may be out of time, speak to a solicitor — exceptions exist, and an experienced clinical negligence solicitor will tell you within minutes whether the time limit applies in your case.

How much compensation can I claim for medical negligence?

Compensation in UK medical negligence cases is divided into two parts: general damages and special damages. The total award depends on the severity and lifelong impact of the harm, your financial losses, and the strength of expert evidence supporting your case.

General damages — pain, suffering, and loss of amenity

This compensates for the injury itself and its impact on your life. UK courts use the Judicial College Guidelines (16th edition, 2023) as a reference point. Examples of compensation bands for general damages alone (not including financial losses):

• Severe brain damage: £282,000 to £403,000
• Severe psychiatric injury: £54,830 to £115,730
• Loss of sight in one eye: £49,270 to £54,830
• Severe back injury: £91,090 to £160,980
• Significant scarring (face, female): £29,780 to £97,330
• Moderate fertility-related loss: £19,640 to £40,300

Special damages — your financial losses

Special damages compensate for measurable financial impact, including loss of past and future earnings, cost of additional medical treatment, rehabilitation, prosthetics, adaptations to your home, ongoing care needs, and travel to medical appointments. In severe cases — such as cerebral palsy claims — special damages for lifetime care can run into millions of pounds.

No reputable solicitor will tell you exactly what your case is worth at the first meeting. Accurate valuations require medical reports, expert evidence on prognosis, and a forensic look at financial losses. Be cautious of any firm promising specific compensation figures before assessing your case.

How does the medical negligence claim process work?

Medical negligence claims follow a structured process under the Pre-Action Protocol for the Resolution of Clinical Disputes. The typical journey from first call to settlement looks like this:

Step 1: Free initial review (Day 0)

You speak to a medical negligence solicitor by phone or online. They take down the basic facts and decide whether your case is worth investigating further. This costs you nothing.

Step 2: Funding agreement and medical records request (Weeks 1–8)

If your case proceeds, you’ll sign a Conditional Fee Agreement (‘no win, no fee’). Your solicitor obtains your full medical records — typically taking 4 to 8 weeks — and arranges After-the-Event (ATE) insurance to protect you against the other side’s costs if the case fails.

Step 3: Independent medical expert review (Months 2–6)

Your solicitor instructs at least one independent medical expert in the relevant speciality to review your records. The expert’s report on breach of duty and causation is the foundation of the case. If the expert does not support your claim, your solicitor will advise that the case should not be pursued.

Step 4: Letter of Claim and Letter of Response (Months 6–10)

If the expert evidence supports the claim, your solicitor sends a formal Letter of Claim to the defendant. The defendant has four months to respond with a Letter of Response — either admitting fault, denying it, or asking for further information.

Step 5: Negotiation and settlement, or court (Months 10–24)

Most UK medical negligence claims settle without a court hearing. Negotiation can take anywhere from a few weeks to several months. Where defendants refuse to admit liability or offer fair compensation, the case proceeds to litigation. Even then, the vast majority still settle before trial.

From start to finish, a typical UK medical negligence claim takes 18 months to 3 years. Complex cases — especially birth injury and severe brain injury claims — often take longer because final prognosis cannot be determined until the patient’s condition stabilises.

How does no win, no fee work in medical negligence?

The phrase ‘no win, no fee’ refers to a Conditional Fee Agreement (CFA). It is the most common funding model for UK medical negligence cases and works as follows:

• If your claim succeeds, the losing side pays your basic legal costs.
• Your solicitor takes a ‘success fee’ — capped at 25% of your damages (excluding future losses) — to compensate for the risk of taking the case on.
• If your claim fails, you pay nothing to your own solicitor.
• After-the-Event (ATE) insurance, arranged by your solicitor at the start, protects you against having to pay the defendant’s costs if you lose.

Always read the funding agreement carefully and ask your solicitor to explain the success fee, ATE insurance premium, and any disbursements (such as expert reports) before signing. A reputable firm will explain all of this clearly in writing.

Can I claim against the NHS?

Yes. NHS patients have exactly the same legal rights to compensation as private patients. The difference is procedural: claims against NHS treatment are administered by NHS Resolution (formerly the NHS Litigation Authority), an arm’s-length body of the Department of Health and Social Care that manages clinical negligence claims on behalf of NHS trusts.

NHS Resolution paid out £2.8 billion in clinical negligence settlements and legal costs in the 2023/24 financial year, across more than 13,500 settled claims. Bringing a claim does not directly cost the doctor or nurse involved — they are indemnified — and it does not reduce frontline NHS funding in any meaningful way. It does, however, hold the system accountable for failures and ensure injured patients can access the care and support they need to rebuild their lives.

Many people hesitate to make a claim because they feel loyal to the NHS. That is understandable. But the NHS is regulated, insured, and legally obliged to put right harm caused by negligent treatment. A claim is not a complaint — it is a separate legal process, and you can pursue both in parallel if you wish.

Frequently asked questions

How do I prove medical negligence in the UK?

You need to prove four things: a duty of care existed, that duty was breached, the breach caused harm, and the harm is measurable. Evidence comes from your medical records, witness statements, and crucially an independent medical expert in the same speciality. Your solicitor coordinates all of this — you don’t need to gather it yourself.

Can I sue the NHS for misdiagnosis?

Yes. NHS patients have exactly the same legal rights as private patients. Claims are administered through NHS Resolution. Bringing a claim does not penalise the individual clinician and does not reduce NHS frontline funding.

How much does a medical negligence solicitor cost?

Under a no win, no fee Conditional Fee Agreement, you pay nothing upfront and nothing if you lose. If you win, your basic legal costs are paid by the defendant. Your solicitor takes a success fee from your compensation, capped at 25% of damages (excluding future losses).

How long does a medical negligence claim take?

A typical UK medical negligence claim takes 18 months to 3 years from first call to settlement. Straightforward cases can settle faster; complex cases — especially birth injury — often take longer because long-term prognosis must be established before final compensation can be calculated.

What happens if I’m out of time?

If you’re outside the standard three-year limit, speak to a solicitor anyway. Exceptions exist for minors, those who lack mental capacity, and cases where the harm was only recently discovered. Courts also have discretion to extend time in exceptional circumstances under section 33 of the Limitation Act.

Will I have to go to court?

Probably not. Around 95% of UK medical negligence claims settle without a court hearing. Even cases that reach the litigation stage usually settle before trial. If yours does go to court, your solicitor and barrister handle the advocacy — you’ll typically only need to give evidence briefly.

Can I claim on behalf of a relative who has died?

Yes. Under the Fatal Accidents Act 1976 and the Law Reform (Miscellaneous Provisions) Act 1934, the deceased’s estate and dependants can claim. Time limits run from the date of death (or earlier date of knowledge). Speak to a specialist solicitor — fatal claims have specific procedural rules.

Will making a claim stop other people being harmed?

It can. NHS Resolution and private indemnity providers analyse claims data to identify patterns and recommend changes to clinical practice. Many recent improvements in NHS safety — including changes to sepsis recognition and maternity safety standards — were driven in part by patterns identified through clinical negligence claims.