The union is holding a conference on 27 Abril about “Human trafficking – SEF and the fight against human trafficking” and the topic was chosen because of the “frightening rise in recent years in human trafficking in Europe, namely in Portugal”.

The union said that human trafficking is “modern slavery” and is a crime that “has to be fought”.

“The SEF inspectors feel powerless as they do not have the resources to fight or pursue most of the crimes”, and in 2017 figures showed that there were thousands of foreigners being abused of farms and that the country had started being used as a new route for trafficking African children.

In most of the cases, the African children arrived with fake documents, but accompanied by adults with legal documents, almost always from Portuguese-speaking countries, the union leader said, stressing that the SEF inspectors “have managed to arrest traffickers and rescue some children”.

The union also said that labour exploitation in rural areas, particularly in Alentejo, “is out of control because of a lack of capacity by SEF to supervise most of the estates where the illegal workers are the victims of abuse”.