Lottery operator Camelot says that the £64 million win would be the largest ever to go unclaimed.
Hertfordshire residents are being urged to check their pockets, cars and sofas for the missing ticket.
Click here for the full interview.
More top news
Police accidentally sent letters to seven people killed in the Croydon tram crash, inviting them to a survivors meeting.
The exhibition includes the gown she wore when she danced with John Travolta at the White House and a dress used for a Vanity Fair cover.
Madonna, John Prescott, Liam Gallagher, Björk, Sam Fox... there are plenty to choose from.