The 40-year-old man is also facing extradition proceedings over the alleged manslaughter.
He was detained by Irish police on April 20 following the execution of a European arrest warrant, and charged with 39 counts of manslaughter as well as immigration offences.
Previously, driver Maurice Robinson, from Northern Ireland, pleaded guilty to 39 counts of manslaughter at Central London Criminal Court on April 8.
On November 25, 2019, Robinson pleaded guilty to assisting unlawful immigration and acquiring criminal property.
Another driver from North Ireland, Eamonn Harrison, 23, drove the container, which carried the victims, to the port of Zeebrugge in Belgium, where it was put on a ferry to England and picked up at the other end by Maurice Robinson on early morning of October 23. He was accused of manslaughter./.
Another arrested, charged with manslaughter in Ireland in connection with Essex lorry incident
A man wanted in connection with the death of 39 people from Vietnam found in the back of a refrigerated lorry in Essex, near London last October, has been arrested and charged with manslaughter in Ireland, according to Essex police.
Essex lorry incident: Driver Maurice Robinson pleads guilty
Driver Maurice Robinson, accused in the deaths of 39 people from Vietnam found in the back of a refrigerated lorry in Essex, near London last October, pleaded guilty to the manslaughter on April 8.