LegalEase Team: An NHS medical negligence claim usually requires evidence that healthcare fell below a reasonable standard and caused avoidable injury or loss. Start by gathering relevant records and contacting a solicitor regulated by the SRA who handles clinical negligence; they can assess the evidence, likely costs and possible funding arrangements. The usual time limit is three years from the treatment or from when you reasonably became aware of the injury, although exceptions can apply. You may also complain to the NHS, but a complaint does not normally extend the legal deadline, and any outcome depends on the facts of your case.