The National Lottery has urged punters to "check their coats and sofas" and even old Halloween costumes" — with just days left to claim the mammoth jackpot.
A mystery lottery winner has just over two weeks remaining to collect the £1million prize before it vanishes forever.
The winning ticket from the November 1 draw, however, has remained unclaimed, with the deadline for coming forward set at April 30.
With a mere 17 days left, time is running out for this unclaimed fortune to go to a lucky winner, who bought a ticket in South Gloucestershire.
Andy Carter, the senior winners adviser at Allwyn, announced: "It's our job to track down our missing millionaire and unite the lucky winner with their prize money.
"Just imagine how this six-figure win could change your life."
And, now, the clock is ticking for the unknown ticket holder with the deadline fast-approaching.
The winning numbers from that Saturday evening draw were 17, 18, 31, 36, 39 and 51, with 29 as the Bonus Ball.
The National Lottery jackpot is still unclaimed
| PAAndy Carter, senior winners advisor at Allwyn, said: "We're calling on players who may have bought a ticket in South Gloucestershire for the Lotto draw on Saturday November 1 last year to check their tickets."
He added: "Double-check any places you may have stashed your pink ticket any safe spots, an old wallet or even the pocket of a winter coat you haven't worn in a while."
Mr Carter also suggested the ticket could be hidden in Halloween costumes, given the draw took place just after the holiday.
While the winner might not necessarily live locally, the jackpot claimant could well have been simply passing through the area.
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Allwyn has urged punters to check their Halloween costumes for the lucky ticket
|PA
Should the winner fail to claim their prize by the end of April, the entire £1million will go to National Lottery good causes.
The senior winners' adviser has now appealed to anyone who was in or around South Gloucestershire in the week before the draw to come forward.
He said: "Do you live in South Gloucestershire or were you in and around the area in the week leading up to the draw?"
The National Lottery has urged players to search their coats, sofas and any other hiding spots where a forgotten ticket might be lurking.
With barely 17 days left, time is rapidly running out for this unclaimed fortune.
The latest National Lottery winner has already revealed how she will splash her own Set for LIfe jackpot.
Tracy Dunn, 63, from Harwich, has indulged the public on how she is going to spend the cash on her pair of pooches, two Shih Tzus called Teddy PomPom and Benny Dimple.
"I lost my dad a few years back, my little dogs are my family so celebrating with them is my priority," the dog groomer explained.
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