I've been left an inheritance from my granny. Both my sister and I are to get 10% each and my dad gets the remaining 80% of the estate. The house has already been signed over to my dad a couple of months ago, and my sister and I are apparently going to get an interim payment of a particular amount in the near future. But why? We haven't asked for an interim payment and we'd have been happy to just wait for the full amount. I mean I'm happy to get it too, I'm not really fussed, but is it usual to get an interim? And if so how do they decide how much will be paid out early?