Camelot has confirmed that no-one has yet come forward to claim the biggest ever UK lottery win after the EuroMillions last night.
An incredible £170million was won by a single ticket holder last night.
The results from the draw came out around 8.20pm and it was confirmed shortly after that the winning ticket was purchased in the UK.
This would make the lucky punter the biggest lottery winner ever from Britain.
However, no-one has yet come forward to claim the win, almost 20 hours since the draw was made.
Simon Horne, Camelot spokesman, said they "remain poised like coiled springs", ready for someone to come forward and claim the prize.
The National Lottery website crashed last night unable to cope with the flurry of people rushing to buy tickets.
The giant win comes after the previous largest ever lottery winners in the UK, Colin and Christine Weir , divorced eight years after bagging a £161 million jackpot in 2011.
Mr Carter added: “It’s been a fantastic year for UK EuroMillions players with an amazing five jackpot wins.

"In June, one lucky ticket-holder, who chose to remain anonymous, became one of the UK’s biggest ever winners after scooping a £123M jackpot.
"As always, the team are on hand to support and help guide the new winner as they start their adventure with their life-changing win.
“Every EuroMillions ticket sold helps contribute to the more than £30M raised every week for Good Causes by The National Lottery - funding everything from local community projects to supporting the nation’s athletes.”
The country's third biggest winners are now Gillian and Adrian Bayford of Haverhill, Suffolk, who bagged £148 million in 2012.
The latest winner will be richer than Tottenham Hotspur striker Harry Kane, believed to have a net worth of about £37million, and pop star Cheryl Cole, reported to have a net worth of around £20million.

They are expected to also be wealthier than actress Helen Mirren, as well as the Duke and Duchess of Sussex.
With the winnings, the lucky player would be able to afford the world's most expensive car - Bugatti's La Voiture Noire, priced at around £14.1 million.
The winner will also be able to visit some of the most expensive islands in the world including Cocoa Island In Maldives and Fregate Island In Seychelles.