A note of caution (and this might be what happened to plimmerian)
If the calendar says that the entry is for a Letter of Adminsitration, there is little point in paying for a copy of the grant as very little extra information will be given (the address of the personal representative) from what the calendar says.
A letter oif Administration is granted where there is no will.
All you'll get for £10 for a Letter of Administration is an A4 document which shows the name of the deceased, their date of death, confirmation they died intestate, the value of the estate and who the personal representative is.
Only apply for a copy of you see the word "probate"