Four men were charged with modern slavery after 29 men, women and children believed to be from Vietnam were found in Devon in a van.
The police stopped the vehicle on Friday morning on the M5 near Cullompton in Devon, after the group of people had reportedly been seen climbing into the rear of the vehicle on a boat.
On Sunday, Frank Walling, 72, from Colne, Jon Ransom, 63, from Kent, Keith Royston Plummer, 62, from Sheerness, and Glen Martin Bennett, 55, from Burnley, was charged with trafficking and the illegal immigration of a member state supported.
The men were remanded and will appear on Monday before Truro Judge's Court.
The police were summoned to Newlyn, Cornwall, just before 7:10 am on Friday after receiving reports of a group of people getting into a van.
Devon and Cornwall police said, "Shortly after 9:00 am, which included 29 men, women and children, the van and another vehicle were stopped on the M5 near J28, which was believed to be all Vietnamese are. Police and partners continue to take care of the persons in the transporter. "