This guide is maintained as a current resource for August 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Comprehensive guide to how legal proceedings are started in clinical negligence claims in England and Wales. Explains the pre‑action protocol (Letters of Claim and Response), limitation periods, issuing claim forms, service on defendants and case management for claimants and solicitors.

Clinical negligence claims in England and Wales arise when someone suffers harm because a healthcare professional or provider fails to meet the standard of care expected in medical treatment. Before such disputes reach court, claimants must usually follow a structured process designed to encourage early resolution and avoid unnecessary litigation. When settlement is not possible, formal legal proceedings are commenced. This article explains, step by step, how clinical negligence proceedings are started, including pre‑action requirements, limitation periods, issuing a claim, and practical considerations for all parties involved.
Understanding Clinical Negligence Claims
A clinical negligence claim seeks compensation for loss caused by negligent medical treatment. To succeed, a claimant must show:
- Duty of Care: The healthcare provider owed a legal duty to the patient.
- Breach of Duty: The care provided fell below the accepted standard.
- Causation and Damage: The breach caused the claimant harm or loss.
Before a claim is issued in court, most claims go through a pre‑action protocol requiring early information exchange and opportunities to resolve the dispute without litigation.
Pre‑Action Protocol: The Starting Point
In clinical negligence cases, the Pre‑Action Protocol for the Resolution of Clinical Disputes sets out the standard steps parties are expected to follow before proceedings are commenced. The purpose of the protocol is to:
- Encourage early exchange of information and evidence.
- Provide an opportunity for early settlement.
- Promote alternative dispute resolution (ADR) where possible.
- Assist the efficient management of the case if court proceedings become necessary.
The protocol applies to claims against GPs, hospitals, dentists and other healthcare providers, whether NHS or private. It establishes a reasonable timetable and requires parties to act reasonably in pre‑action conduct.
Letters in the Pre‑Action Protocol
The key pre‑action steps are:
1. Letter of Notification
When a claimant first instructs solicitors, they often send a Letter of Notification to inform the defendant that a potential claim may be made. This alerts the healthcare provider and its insurers to the possibility of a clinical negligence claim, without yet setting out detailed allegations.
2. Letter of Claim
The Letter of Claim is the first substantive step. It must:
- Summarise the claimant's case, including the facts, alleged negligence and injuries.
- Include supporting medical evidence, where available.
- Identify the defendant and state how the healthcare provider's conduct caused the alleged harm.
The defendant's representatives have up to four months from service of the Letter of Claim to investigate and respond (the Letter of Response). During this period, they may request medical records, seek expert input and consider liability and quantum.
3. Letter of Response
The defendant's Letter of Response addresses the allegations of breach and causation and typically indicates whether liability is admitted, partially admitted, or denied. It may attach relevant documents or expert evidence. If the claim is denied, the claimant may decide to issue proceedings.
Alternative Dispute Resolution
The protocol encourages parties to consider ADR, such as mediation or early neutral evaluation, to resolve disputes without issuing proceedings. Although not compulsory, courts expect parties to show they have considered ADR before starting litigation.
Limitation Periods: When Proceedings Must Be Started
Under the Limitation Act 1980, claimants generally must issue proceedings within three years of:
- The date of the negligent act or omission, or
- The date on which the claimant first knew (or reasonably ought to have known) that the negligence caused significant injury and identified the responsible defendant.
This period is known as the “date of knowledge.” If proceedings are not issued within the limitation period, the defendant may use this as a complete defence and the claimant could lose the right to pursue the claim.
There are exceptions to these rules. For example, the limitation period may be extended for minors until their 21st birthday or suspended for individuals without mental capacity. Claimants should take early legal advice to understand how limitation rules apply to their case.
Issuing Court Proceedings: The Formal Start
If the pre‑action stage does not lead to a resolution, the claimant proceeds to issue formal legal proceedings. The key steps are:
1. Preparing the Claim Form
The claimant (usually through their solicitor) prepares a claim form and particulars of claim. The claim form (often Form N1) is the document that officially begins court proceedings. It sets out:
- The names of the claimant and defendant.
- A brief summary of the claim.
- The remedy sought (such as compensation for negligence).
- The court in which the claim is being issued.
2. Filing at Court
The claim form and particulars are filed at the appropriate court (often the County Court or High Court, depending on claim value and complexity). Once filed, the court issues the claim, and the claimant pays the relevant court fee. The issued claim form then becomes enforceable and is ready for service on the defendant.
3. Serving the Claim on the Defendant
After issuance, the claim form and particulars must be served on the defendant so they are formally notified of the proceedings. Service must comply with the Civil Procedure Rules (CPR) - usually by personal service, first‑class post, or by a method the court orders. Failure to serve correctly can delay the proceedings. Once served, the defendant typically has 14 days (or longer if acknowledged) to file an acknowledgment of service and a defence. The court then sets a timetable for case management.
Case Management After Issuance
Once proceedings are issued and the defendant has filed a defence, the court undertakes case management. This includes:
- Parties exchanging evidence and documents.
- Disclosure of relevant records.
- Exchange of expert reports on breach, causation and prognosis.
- Timetabling hearings and potentially setting a trial date.
Case management ensures the claim progresses efficiently and prepares the issues for hearing or settlement negotiations.
Practical Considerations Before Starting Proceedings
Compliance With the Pre‑Action Protocol
It is important that claimants and defendants comply with the pre‑action protocol because courts may impose sanctions if one party fails to follow its principles. Minor technical breaches are less likely to lead to sanctions than substantive non‑compliance, but parties should be prepared to explain why they have not complied if proceedings are issued without full protocol adherence.
Expert Evidence During the Pre‑Action Phase
Claimants typically gather medical evidence before issuing proceedings to support allegations of breach, causation and injury severity. Solicitors may request medical records and instruct expert reviews before drafting the Letter of Claim. The defendant's response may involve obtaining their own expert opinion. Pre‑action evidence helps streamline proceedings if litigation becomes necessary.
Costs and Timeframes
The pre‑action and litigation process can take significant time. The pre‑action protocol stage alone may last several months as the defendant investigates and responds. Once proceedings are issued, formal litigation can take 12–24 months or more, depending on complexity and court timetables. Settlements can occur at any stage.
Common Questions About Starting Clinical Negligence Proceedings
Do I Have to Follow the Pre‑Action Protocol?
Generally, yes. The pre‑action protocol sets the expected standard of conduct before issuing proceedings, and courts expect parties to follow it. Failure to do so may affect costs and case management.
What if I Miss the Limitation Deadline?
If a claim form is not issued within the three‑year time limit (or applicable exception), the defendant can use limitation as a defence, potentially barring the claim. Early legal advice is crucial to avoid this risk.
Can Proceedings Be Started Before the Protocol Is Complete?
In exceptional circumstances - for example, to preserve rights within limitation periods - proceedings may be started before the protocol is complete. In such cases, parties often agree to a stay of proceedings to complete pre‑action steps. The court must be satisfied that this is justified.
Summary
Legal proceedings in clinical negligence claims in England and Wales begin with structured pre‑action steps under the Pre‑Action Protocol for the Resolution of Clinical Disputes. Claimants typically send a Letter of Notification and a detailed Letter of Claim, giving defendants the opportunity to investigate and respond. If the dispute cannot be resolved, the claimant issues a claim form and particulars of claim in court, which are then served on the defendant. Throughout, claimants must be aware of limitation periods, proper service rules and the importance of compliance with procedural requirements. Understanding these steps ensures that claims are brought effectively and in compliance with legal standards, helping claimants pursue compensation for negligent medical harm.