A National Lottery spokesman said:
This Bank Holiday has turned out to be truly memorable for one UK winner, not only will they enjoy the extra day off but they'll now also be banking a multi-million-pound cheque.
This single UK ticket-holder will enter the exclusive top 10 on The National Lottery rich list - at number eight - and we've got the champagne on ice ready for the lucky winner to claim their prize.
As well as offering a chance to win life-changing prizes, EuroMillions continues to help raise over £33 million every week for National Lottery-funded projects across the UK.
More top news
After the heatwave come the storms, with lightning flashes illuminating the night sky across much of the country last night.
An Independence Day event at a UK base has been cancelled by the US Air Force over security fears.
British firms predict the economy should sustain a "solid" pace of growth for the rest of the year thanks to lower oil prices and inflation.