Update: The British ticket-holder of Friday's £107.9m EuroMillions jackpot has come forward to claim their prize - the fourth biggest win in UK National Lottery history.
No details have been released about the winner or winners, if the ticket belongs to a syndicate, or where the ticket was bought.
A National Lottery spokesman said: "We're delighted Friday's ticket-holder has come forward to claim this amazing prize.
"This massive win ranks fourth biggest on the National Lottery Rich list and is the first EuroMillions jackpot to be won here in the UK so far this year."
Earlier, the lottery operator said it had "Champagne on ice ready for the lucky winner."
The winning numbers:
6, 24, 25, 27 and 30. Lucky star numbers: 5 and 9
If the jackpot has been won by an individual ticket-holder, their new place as 745th richest person in the UK means their wealth eclipses that of George Michael and Robbie Williams, who are worth around £105 million each, according to the Sunday Times Rich List.
The money could be paid out as soon as tomorrow, when the banks open.
Some of Britain's other big-money lottery winners
Adrian and Gillian Bayford: - £149 million
Before last night's win, the most recent British winners to hit a huge National Lottery jackpot were children's nurse Gillian Bayford and her then-husband Adrian, from Suffolk, who scooped £148,656,000 in August 2012 - the UK's second biggest jackpot.
The couple splashed out on luxury holidays cars and a new home, but split-up last year. Adrian Bayford announced last week that he is set to re-marry, following a six-week romance with stable worker Samantha Burbidge.
Colin and Chris Weir - £161 million
Europe's biggest lottery winners are Ayrshire couple Colin and Chris Weir, who won £161,653,000 in July 2011.
Chris Weir, formerly a psychiatric nurse, and ex-cameraman Colin, treated their family and friends, as well as becoming generous charity donors. Last month the couple bought a £3.5 million mansion in Troon, Scotland, after viewing it for 10 minutes.
Dave and Angela Dawes - £101 million
Dave and Angela Dawes, from Cambridgeshire, took home £101,203,600 from the EuroMillions in October 2011 - after only their third time playing the lottery.
The pair reportedly split in November last year.
Nigel Page - £56 million
In February 2010, Wiltshire couple Nigel Page and Justine Laycock became the UK's biggest non-syndicate lottery winners to go public, following their £56 million win.
The pair hit the headlines again when it emerged they gave their old home and car to their former cleaner, and also when Page was later forced to pay £2 million to his ex-wife, who had left him 10 years before the win.
Les and Sam Scadding - £45.5 million
Les Scadding and his wife Samantha Peachey-Scadding, from Caerleon, South Wales, won £45.5 million on the EuroMillions in November 2009. The pair reportedly split last year.
Images: Rex Features