I work for a billionaire family that own a successful DIY chain.
Their security is beyond belief. A car travels ahead and one behind. The grounds are swept before they come home, and the kids have 24/7 security even at school.
They are from a humble background and the wife doesn't like it at all. She has mentioned the "Golden cage" phrase a few times.
But she has said that you get used to it and accept the risks as part of it all.
I think the best advice i could give to anybody winning the lottery is NOT to go public. Ok a few papers will try and cause trouble, but that is better than most of the world knowing who you are. Plus you will have the cash to legally silence the papers for intrusion.
My plan should it ever happen is to tell everybody i've won "Set for life" no matter how big a win it was.
That way, people around you will see changes, but assume it is coming from the monthly pay out.
It will also stop them assuming they are getting a big wedge from a one off big win.
I would say the house is mortgaged and the cars on lease. By the time they figure out that £10k a month is stretching too far, they will feel less entitled to a share of your win!