Thanks for your question. Please kindly RATE my answer when you are satisfied
Could you confirm that your mother in law was domiciled in E&W as I note you mention she passed away in ROI please?
Did she have other children? Do you know who the beneficiaries of her estate are?
Thanks. Did she live permanently in ROI or was she just visiting? Did she have any assets in ROI?
Thanks. Based on what you say your husband (her son) would appear under English law to have a potentially strong claim to a share of her estate. One slight issue is that from what you say much of her estate may be located in Ireland though and English law does not apply directly in Ireland particularly in relation to any property she owns there and whilst I can assist in relation to any assets she has in the UK you may wish to ask the opinion of an Irish lawyer in relation to your husbands position in Ireland - this site does have an ROI section too. Would you like me to continue in relation to the UK estate?
Was the will you refer to made in the UK or ROI?
You are not sure?
Let me know how you would like to proceed.