The ex-employee was left "burned" and scarred by his work, refused lunch breaks and treated "like a slave", a jury has heard.
Workers were allegedly deprived of breaks despite working up to 11 hours a day, and one spoke of being left with a weekly wage of just £10.
Two people have been arrested in a village near Penrith as part of a police investigation into alleged modern slavery offences.
Victims of human trafficking are being forced into prostitution in pop-up brothels set up across Cumbria, say police.
A 30-year-old man from Annan has been arrested on suspicion of modern slavery offences, after police found five foreign men on a fishing boat in Portsmouth.
Officers located the men at Camber Dock on East Street at around 3.30pm on Thursday 7 December.
The man, from Annan in Dumfries and Gallaway, is currently being questioned by police.
Five men aged between 35 and 46 were taken to a place of safety and have been formally referred to the National Crime Agency as victims of modern slavery.
Human trafficking, labour exploitation and modern-day slavery were all issues addressed by Cumbria Police at a special event in Carlisle.
Over two hundred community leaders, social workers and police officers were at Carlisle racecourse to find out more about spotting the signs for slavery and human trafficking in our region.
Jessica Nevin spoke to the Police and Crime Commissioner Peter McCall and Detective Chief Inspector Lesley Hanson to find out more on what can be done locally: