Having watched the Euromillions climb up and up, I have looked into it JUST IN CASE... I know if I won that much, then I'd like to give my friends and acquaintances up to a million each so their lives changed too.
Anyway, the simple answer is NO, there is no tax to pay PROVIDING the gift is made from what you win, and not interest earned on it BUT if you die within 7 years of making that gift, then they would be liable to pay tax at up to 40 per cent of the gift. So basically, if I won, I'd give out a million but I'd warn the person I gave it to that to be safe, only spend �600,000 and keep the other �400,000 invested until those 7 years are up just in case they need to pay the taxman.