I am really sorry to hear about this. My mother in law and sister in law passed away within a few months of each other. My mother in law left everything equally to her children, but probate etc still had not been completed by the time my sister in law passed away. It was all very straightforward, the solicitor dealing with my sister in law’s estate was told she was due an inheritance and they just waited for that to come in before dealing with my sister in laws affairs. If there is a solicitor dealing with your grandmothers estate they will ensure it is all done correctly. If the executor is acting alone then you may not be able to see the will until probate is granted.