Thank you for your question
My name is Clare
I shall do my best to help you but I need some further information first
Did the Grandchild die before or after your mother?
What is the exact wording of the gift to the grandchildren
anything at the end of that entire paragraph
Did the Grandchild leave any children?
Then the gift from her Grandmother simply fails and the money remains in the Estate
I hope that this is of assistance - please ask if you need further details