Tommy Connors Snr, 52, his son Patrick Connors, 20, and daughter Josie, 31, and Josie’s husband James John Connors, 34, had kept the men in squalid conditions at Greenacres in Bedfordshire.

The victims were made to work for nothing and slept in sheds and horseboxes at the Greenacres caravan site near Leighton Buzzard. They were exploited, verbally abused and beaten for financial gain, Luton Crown Court heard.

The victims had been forced to work in the Connors’ block paving business.

They were given next to no food, forced to wash in cold water and paid little or no money for working up to 19 hours a day, six days a week.

Tommy Sr and his son Patrick were found guilty of actual bodily harm and a charge each of servitude and forced labour.

Josie and her husband James John were convicted of two counts each of servitude and forced labour, with James John also guilty of actual bodily harm.

All four have been remanded in custody until Thursday.

No decision has been reached on Tommy Snr’s sons Johnny, 28, James, 24, and Tommy Jnr, 27.