If I won say, £100m I'd give £10m to each of my parents and £5m to each of my three siblings, then a million to a couple of my closest friends. Then I'd buy a boss house, and a couple of other boss houses somewhere warm, buy a boss car, get an iPad, get a Macbook, invest some, give some to charity and then... fuck knows.
Having said that I'd probably have a heart attack the moment I found out I'd won. That'd be shit.