Sorry to sound like a miserable bastard, but i think you need to take a breather and listen to yourself.

First of all, you don't even know how much your getting. It could be £50, or £50000. I don't know if i'm the only one, but the way you came across here saying things like "im not 100% sure how much exactly but im guessing it may be a fair whack as back in 1992 he got a 3rd share of £1.8 million" makes you sound like your expecting alot, and that in some ways, you are glad that your Grandad has decided to spunk all his dosh away early.

Like i said mate, i'm not trying to sound harsh. I just think it's silly how your thinking up all these crazy ideas about Escos's and whatnot, when you don't even know if your getting a substantial enough ammount to do such a thing.

Oh, and just to add. If you do end up getting a fairly significant whack of cash, i would spend a chunk of it paying off any debts or mortgages you have first, as you already have a pretty nice motor. Then spend some on a Holiday and/or car and save the rest for a rainy day.