In most cases, it is possible to bring a cerebral palsy negligence claim at any point up to a child’s 21st birthday and, in some cases, even beyond that.
That is because when a child is injured, the three year “limitation period” on their right to claim does not start until they are 18 (and ends when they are 21).
However, if your child has lost mental capacity (the ability to make decisions for themselves) it may be that there is no limitation period at all.