Each mirror Will can include instructions that if both parents die at the same time, both estates will be left to any surviving children. Guardians, who will look after any children aged under 18, can also be specified in mirror Wills in the event that both parents die.
If the couple have no children then their money and possessions can be left to another beneficiary named in both Wills.
Usually, the partners are the sole beneficiary in each other’s mirror Will and are also each other’s Executor. Additional Executors should also be named in case both partners die at the same time. In this case the additional Executor may be another family member, a close friend or a trusted professional adviser. Each partner can choose the same, or different Executors.