UNCLAIMED winning lottery tickets were bought in Bristol and Gloucester, the National Lottery has said.
Whoever purchased the £1million ticket for the July 26 draw has not yet come forward and the National Lottery said it was desperate to find the owner.
In total, 12 potential millionaires have yet to claim their prizes from the EuroMillions draw, which made 100 entrants winners of £1million each. So far 88 have come forward.
The remaining 12 have until January 2014 to claim their winnings.
As well as Bristol and Gloucester, tickets were bought in Fife, Bolton, Kensington and Chelsea, East Dunbartonshire, Havering, Sutton, Blackpool, the Borough of Fylde, West Dorset and Weymouth and Portland, Brighton and Hove, and the County Borough of Rhondda Cynon Taf.
"Imagine walking around not knowing you are a millionaire," a National Lottery spokesman said. "We urge every player to check their tickets.
“This draw has been life changing for 88 ticket holders already and we are desperate to find our missing millionaires."