Br1gau posted while I was typing, so to add a little:
The sealing in England doesn't generate any records beyond what you see in the probate index, so it's not worth ordering anything based on that.
Where the original confirmation was in Scotland, and before 1925, you can download the relevant documents from Scotland's People. You have to buy credits there to do this - these can also be used for getting copies of BMD registrations and census entries.
In this case, the papers are indexed under the name Helen Meikle, and there are sets of images available for the will (ref. SC70/4/484) and the inventory (SC70/1/581). Each set will cost 10 credits.