Hi, thank you for your question. Unfortunately your uncle is free to leave his estate to anyone he wishes and the clean break you reached with your wife is only in relation to claims between you regarding your own assets - the inheritance from your uncle to her is not a matrimonial issue and the clean break prevents you from applying to court to seek a share of her inheritance.
Your uncle had no legal obligation to distribute his estate to family members, however if he had children, dependants or cohabitees of people who were financially reliant on him they would have been able to apply to court for reasonable financial provision from his estate - the time limit for this is 6 months from grant of probate.
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