The unclaimed EuroMillions prize is from the UK Millionaire Maker draw, which was made on September 9 last year. The winner has until Wednesday, March 8 to claim the £1 million prize.
If no one comes forward by the deadline, the money will be donated to National Lottery projects across the country.
The ticket was bought in Tewkesbury, Gloucestershire.
The National Lottery was launched in 1994 and has created more than 6,600 new millionaires so far.
Here are some of the lucky winners from our region.
The ticket was bought in Tewkesbury, Gloucestershire.
5. Workmate winners
A Penistone syndicate celebrate their £213,751 win at Naylor Myers Builders Merchants in February 2006. From left to right are Dave Rogers, Michael Walker, Ian Haddington, Dawn Morfitt, Andrew Garwood and James Riley Photo: Roger Nadal
6. Clever mum
Lottery winner Trish Emson and baby Benjamin of Elliot Close, Wath in Benjamin's room stuffed full of presents. Trish won £1.7 million in October 2003 but vowed to keep her feet on the ground - in 2015 she was working as a dinner lady in Benjamin's school Photo: Andrew Partridge
7. High-scoring game
Lottery winners William and Brenda Green receive their cheque for £218,154 from snooker player Andy Hicks during the World Snooker Championships at the Crucible Theatre, Sheffield in April 2004 Photo: Dennis Lound
8. Sadness for winner
Retired miner Peter Brown from Sheffield won £1,284,612 in July 2002. Sadly, his wife Hazel died just a few months before the big win and he said no amount of money could make up for that loss. Photo: Andrew Partridge