If you are left out of someone’s will there are two realistic courses of legal action. You can try to claim that the will is invalid. This is only going to be a viable course of action if, by invalidating the will, you stand to receive something from...
When a same-sex couple undertook fertility treatment which led to the birth of a baby girl, the intention was that both would be listed as her legal parents. However, due to mistakes made in processing the necessary forms, only one of the couple was shown as a legal parent.
An application to the family division of the High Court was necessary for the mistake to be put right.
Official mistakes are generally able to be corrected, and preferably the rectification process should begin as quickly as possible after the error is noticed.