A UK ticketholder has won £14.5 million in Friday's EuroMillions draw, three days after a British player won nearly £20 million.
The winning numbers were 19, 25, 33, 36 and 48, and lucky star numbers 2 and 9.
Two UK ticketholders also won £1 million by matching the Millionaire Maker codes XCQS31881 and ZDQX57144.
Andy Carter, senior winners' advisor at The National Lottery, said: "What a week it is for National Lottery players.
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"First we have a UK EuroMillions winner of £19.9m on Tuesday and now just three days later we have a £14.5m UK jackpot winner."
Tuesday's jackpot is an estimated £14 million and three UK millionaires will be created.