National Lottery Set for Life winner given three-week warning to secure £3.6million jackpot after prize unclaimed for 158 days

If claimed before the April 22 deadline, the winner will receive £10,000 every month for 30 years.

The National Lottery has been campaigning throughout March to find the mysterious winner, even taking over Sevenoaks train station with special announcements.

Time is rapidly running out for the winner to come forward and claim their substantial prize.

The winning ticket was purchased in the Sevenoaks District for just £1.50.

The winning numbers from the October draw were 2, 11, 29, 37, 45, and Life Ball 6.

This represents the largest possible prize available in the Set For Life draw, with the winner matching all five numbers plus the Life Ball.

Set For Life draws take place twice weekly on Mondays and Thursdays.

Players who match all five numbers without the Life Ball can still win £10,000 every month for a year, totalling £120,000.

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The National Lottery publishes all unclaimed prizes on its website, where several other unclaimed prizes are currently listed.

The National Lottery has been making significant efforts to locate the winner, including a campaign at Sevenoaks train station.

Patrick Lisoire, from National Lottery operator Allwyn, said, "Sevenoaks station is one of the busiest transport hubs in the district, so it's possible the lucky ticketholder, or someone they know, is travelling through here."

He added: "Wouldn't it be incredible to be able to swap a season ticket for a winning National Lottery ticket!"

Southeastern's Sevenoaks Station Manager, Jack Heidrey, also said: "It's exciting to think that one of our commuters could be the winning ticketholder but maybe doesn't know it yet."

The station has been broadcasting special announcements to raise awareness about the unclaimed prize.

If the prize remains unclaimed by the April deadline 22, the £3.6million and any interest earned will go to benefit National Lottery Projects across the UK.

The National Lottery website provides information for players who aren't sure how to claim their prizes.

Currently, there are several other unclaimed prizes listed on the National Lottery website, including a EuroMillions prize worth £321,840.60.

Lottery officials hope their campaign will prompt the winner to check their ticket before time runs out.

With just three weeks remaining, the search continues for the lucky ticket holder who may be unaware they're sitting on a fortune.