Five workmen have been handed in total over two months in jail after failing to isolate upon arrival on the Isle of Man.
Island restrictions have been relaxed but anyone arriving must self isolate for 14 days in a bid to prevent a resurgence of cases.
A court heard how the five welders aged between 18 and 62 arrived on the island by ferry from Heysham in Lancashire, on September 29.
The court heard they were due to be doing two days maintenance work on the Manx Electric Railway for Haigh Rail.
Instead of going straight from the port to their accommodation, the group went to a Tesco store to buy alcohol, it was heard.
They were wearing masks but aroused suspicion after engaging in conversation with a local, who heard one say, "I've just got off the boat."
The incident was reported to a Tesco staff member and the men were arrested by police later that night.
All five defendants, from Doncaster, South Yorkshire, pleaded guilty to failing to comply with Covid-19 restrictions under the Emergency Powers Act.
Appearing before magistrates via video link, they were each handed 14 days behind bars.
Enter your postcode for updates on cases in your area
Those jailed were Luke Kevin Fletcher, 22, Jack Michael Anthony Smith, 18, Robbie Rhodes, 18, Michael Stewart Smith, 43, and Christopher Leroy Lafayette, 62.
The Manx courts have now sent 12 people to prison for breaking isolation rules.
Lockdown on the Isle of Man ended on June 15 and there are currently no social distancing rules.
Pubs, restaurants, cinemas and gyms are open as normal.
