In most adult medical negligence claims in England, you usually have three years to issue court proceedings. That period runs from the date of the negligent treatment or from the date you first had sufficient knowledge that your injury may have been caused by negligent care.
Missing the deadline can mean the court refuses to hear the claim. There are important exceptions for children, people who lack mental capacity and some fatal claims, and the court has limited discretion to allow a late claim — but that discretion should never be relied on. If you are unsure when your three years started, get advice promptly.
Date of injury vs date of knowledge
Where the harm is obvious on the day — for example an injury noticed immediately after surgery — time often runs from that date. In many misdiagnosis and delayed diagnosis cases, the picture is different. You may only later learn that earlier symptoms were missed, a scan was misreported, or a delay affected your prognosis.
The “date of knowledge” is when you knew, or ought reasonably to have known, that you had suffered a significant injury that might be linked to substandard care and that a defendant (such as an NHS trust) could be identified. It does not wait until a solicitor confirms you have a strong case.
Children
For a child injured by negligent treatment, the three-year period normally does not start until their 18th birthday. They generally then have until their 21st birthday to start court proceedings. A parent or litigation friend can bring a claim earlier on the child’s behalf.
Mental capacity
If the injured person lacks the mental capacity to manage their own affairs, the limitation period may not run while that lack of capacity continues. If capacity is later regained, the three years usually start from that point. These cases need careful legal and medical assessment.
Fatal claims
Where someone has died, different rules can apply. Claims by the estate or dependants often need to be started within three years of the date of death or of the relevant date of knowledge. Timing in fatal cases can be complex — seek specialist advice without delay.
Claims that seem out of time”
Under section 33 of the Limitation Act 1980, the court can sometimes allow a claim to proceed outside the usual period. Judges look at reasons for delay, the strength of the evidence, fairness to both sides and whether a fair trial is still possible. Extensions are not guaranteed. The safest course is always to act within the original three years.
Why early advice matters
Even when three years sounds generous, obtaining records, instructing experts and protecting a near deadline takes time. An NHS complaint does not stop the limitation clock. If your deadline is approaching, a solicitor can assess urgency and, where needed, take protective steps while investigations continue.
Not sure if you are still in time? Call Cooper Hall Solicitors on 0333 777 5001, use the contact form, or speak with Farhan Khan. We provide a free initial consultation for clients across England and can clarify your limitation position before evidence is lost.
The “date of knowledge” is when you knew, or ought reasonably to have known, that you had suffered a significant injury that might be linked to substandard care and that a defendant (such as an NHS trust) could be identified. It does not wait until a solicitor confirms you have a strong case.
