A UK Lotto multi-millionaire has just four days left to claim £9.4 million (US$16 million).
UK National Lottery Operator Camelot yesterday appealed to the unknown jackpot winner to come forward to join the 125 new lotto millionaires created this year.
The winning ticket, bought in July, bears the numbers 3, 12, 17, 36, 44 and 49.
But if it is not presented to Camelot by 5:30 pm on January 2, the prize — and interest of £211,000 (US$363,100) — will be passed on to the Lottery's good causes fund.
It is the only jackpot this year which remains unclaimed.
A Camelot spokesman said the ticket had been bought in Doncaster.
He added, "With the deadline only four days away now, Camelot are appealing to players who bought a ticket on Wednesday, July 6, 2005 to check and double-check their tickets."
The plea came as Camelot revealed that a couple from Hertfordshire had come forward to claim the £15 million (US$26 million) Christmas Eve jackpot.
They will be presented with the check today at the home of their favorite team Tottenham Hotspur's White Hart Lane stadium.
Meanwhile, analysis of 2005's winners has revealed the most likely factors for success, including having the star sign Leo, being a police officer or firefighter, or living in the north-west of England.
Leo jackpot winners include Charmaine Collins, from Witney, Oxfordshire, who got £2.3 million.
The north-west was home to big winners including Deborah Mather, of Chorley, who picked up £5.1 million.
"Exotic holidays and sports cars still top shopping lists but the most unusual item has to be using a jackpot to record a band's first single.