I've very gratefully received a fair sum of money from a family member's will. I don't want to use it until I buy a property for deposit maybe in a year or two. I can put £4k in a Lifetime ISA but no more than that per tax year. Not sure where is best to put the rest?? Premium bonds? Or is a saving account like Nationwide best? I know interest rates aren't great. Any wise words would be greatly appreciated! 