A winning lottery ticket worth 1million was purchased in South Lanarkshire (Photo: Shutterstock)
A claim for the jackpot has been going through the validation process having been staked in April.
The prize was technically due to expire at 11.59pm on Sunday.
But on Monday afternoon, a Camelot spokeswoman revealed they are now arranging payment to the winner.
She said: "We can confirm that we are currently finalising the validation of a claim made on this prize and are in the process of arranging for payment to be made to the ticket-holder.
"Once the prize has been fully validated and paid, we'll issue confirmation of that."
The National Lottery previously urged the mystery ticket-holder to come forward at the end of March.
Reporting by PA
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