Furchester For some reason that I cannot remember, Caroline was Will Grundy's godmother, and she has in the past been generous towards him. As Caroline doesn't have any children I think it is likely that she will have left him a bequest, but whether it will be 1k, 10k or 100k I wouldn't like to guess.
It happened before that Will inherited something and Ed didn't, I think it was a relative of Clarrie's? I think that is how come Will owns #1 The Green(?) ?