My experience is not quite the same as David's. Usually the second grant reflects a re-evaluation of the estate rather than anything else. The first probate and will provides you with all the information likely to be of genealogical value - names of legatees, identification of family members, addresses, details of bequests etc, whereas the second grant is just likely to record the increased value of the estate, and probably won't come with a second copy of the same will, the text of which will not have changed. In fact, with one will of this type I'm thinking of, the second grant was just the same sheet showing the first grant with a handwritten amendment of the value overwritten on the page and a new date. Definitely not worth £1.50, let alone £16.
