I stand by my earlier statement of not telling anyone. Money changes people.
You can't not tell the people you know, well, more accurately, you can't keep them from knowing.
If you quit your job to sit at home all day, they'd know you got money from somewhere, if you bought a nice car, clothes, house, anything, people can tell roughly how much money people have and any sudden change in spending would be very obvious.
The thing is to let people know, and if everyone changes, so be it, there are other people out there.
However its not a massive coincidence that rich people hang out with other rich people, its easier. When you're out at a club, having 87million in your pocket and a bunch of guys who work themselves to death, half will resent you if you don't pick up the tab, some will feel jealous, and unless you're a git, you'll feel bad if you don't pick up the tab. However if you always pick up the tab, then people start to expect that of you and treat you differently.
If you have 87 million in your back pocket and go to a club where your two best friends have 150million to their name, its a non issue.
What would I do?
Invest a LOT of it, move out of London to a very much bigger house with a LOT more space, one with enough rooms that I can have a large bedroom, large computer room/study, big room for a gym(as in, huge). Just a fairly decent fairly big but fairly cheap non city house.
Buy a couple decent places, probably apartments, in London, and New York and a holiday home on a fairly exclusive(IE no chavs to be seen, EVER) island somewhere with superb weather.
Then work hard, invest in lots of different business's so I have a lot of income, hire managers to take over each place once they are up and running.
Then live off savings while funneling most of the profits into charitable work. Build and maintain/pay a few staff to run some homeless shelters here and hopefully build some schools, roads, water treatment plant type places in Africa.