This Q&A considers whether, if where an individual dies in England and Wales leaving a valid Will to deal with the administration of their estate worldwide, and the deceased owned assets in the Republic of Ireland as at the date of death, does the estate need to make payments to HMRC for IHT where Capital Acquisition Tax (CAT) (Irish IHT equivalent), tax has already been paid in the Republic of Ireland. It also considers if the estate does not have to pay tax that has already been paid in the Republic of Ireland, are the executors of the estate under any obligations/duties towards HMRC.