My father in law died without a will last year. He had a house (£300K), and a business (owned premises worth at least £2million)...the business he had 25% share, wife had other 25% share and my husbands brother 50% share....we thought we might be entitled to some of his 25% share as he didnt leave a will...but as in many families nothing has been said and it is all a bit delicate...shoudl we investigate?..how would we do this?