Five men are due to appear at the Old Bailey in London by video-link tomorrow charged in connection with the investigation into the deaths of 39 Vietnamese nationals in the back of a refrigerated trailer in October.
One of them is 25-year-old Maurice Robinson from Craigavon, Co Armagh, who has previously pleaded guilty to conspiracy to assist unlawful immigration and acquiring criminal property.
Another Northern Ireland man is also due to appear.
The three others are all from England.
The investigation is being conducted by Essex Police, who have been assisted by the gardaí, the PSNI and the British National Crime Agency.