There are various time limits for contesting a will. In the United Kingdom, a person must contest a will within six months of the date of probate; claims made after this date are usually regarded as weaker.
There are, however, several situations in which this deadline is not applicable. For instance, you could challenge the Will after the first deadline has passed if fresh information becomes available later. Furthermore, even when a claim is filed after the customary deadline, the court may use its discretion to approve it if there are accusations of fraud, undue influence, or lack of testamentary competence.