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
A young mother has accused an Uber driver of attacking her after a row over making two drop-offs.
Model Rosie Nelson writes for ITV News, revealing why she is calling for MPs to pass a new law protecting models from becoming too skinny.
Amid calls for new laws to regulate the size of models, we look at how the face of fashion has changed over the past 60 years.