Knocky's Nose
Mon nez est retiré.
I think the friend issue is a real problem with this amount. With that amount there might be an expectation that you could give a friend £500,000 or even a million and barely notice it. Then where do you draw the line as to which friends and how much?.
I'd lie about the amount I'd won. I'd say I'd won the National Lottery Rollover at £7m, then dole out £3.5m to friends and family (which would genuinely change their lives). I'd then justify all my purchases by saying the house(s) are mortgaged, the fancy cars are on finance, and the holidays are all cut-price, and my few million in the bank has been put with a company providing some incredible returns.
That way, all the animosity and jealousy is gone. You have been seen to give away a very generous half of your winnings so no twunt can get eggy - and you can live a life of luxury. When you die and they see the other £160m in your will.... you're dead anyway, so who gives a shit.