I wouldn't pay for anything big. a million dollars isn't that much to be quite honest so I reckon i'd just keep it in the bank and use the interest each month to pay for bills, food, clothes (I'm in desperate need for a clothes shop, I'm told

) and random things. Possibly put myself through university etc and maybe use a bit in the future for a small apartment and the works for when I feel like moving out.
Realistically, £500K isn't going to last too long and will maybe last only a decade if a person is silly with the money.