The deadline for filing a fall at work claim is 3 years from the date of the accident. But if you were under 18 at the time of the accident then it is 3 years from your 18th Birthday. There are also special rules if you did not have capacity. This means that in accordance with s2 of the Mental Capacity Act 2005, “a person lacks capacity in relation to a matter if at the material time, he is unable to make a decision for themselves in relation to the matter because of an impairment of, or a disturbance in the functioning of, the mind or brain.