The National Crime Agency (NCA) is urging British holidaymakers to be on the lookout for 15 fugitives who are thought to be hiding out across Spain.
The criminals include Midland drug dealer Robert Knight, who is believed to be part of a gang who tried to import 6kg of cocaine through Heathrow Airport in 2008.
The 52-year-old is wanted along with 14 others and rewards of up to £1,000 have been offered to anyone who provides information that leads to the arrest of any of the fugitives.
The hunt to track them all down, codenamed Operation Captura, involves Crimestoppers, the NCA, the Foreign and Commonwealth Office and Spanish authorities.