There is a time limit for making a claim for medical negligence – the limit is two years from the date of the incident or in some limited circumstances the date in which the injured party knew or ought to have known that treatment had resulted in injury or made a condition worse. This is known as the ‘date of knowledge’. There are certain exceptions, notably for minors. If a person is under the age 18, the two-year countdown from the ‘date of knowledge’ does not begin until their 18th birthday.