The lorry driver accused of manslaughter after 39 bodies were found in a refrigerated trailer has appeared in court via video link.
Maurice "Mo" Robinson has been remanded in custody until 25 November where he will appear at the Old Bailey for a further hearing in which he will plead guilty or not guilty.
The 25-year-old, of Craigavon, Northern Ireland, appeared for Monday's hearing at Chelmsford Magistrates' Court via video link from custody and made no application for bail.
He was charged on Saturday with 39 counts of manslaughter, conspiracy to traffic people, conspiracy to assist unlawful immigration and money laundering.
The lorry driver was arrested shortly after police were called to the Waterglade Retail Park in Grays, Essex, in the early hours of Wednesday after the 39 bodies were discovered in the refrigerated trailer.
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Three other people have been arrested on suspicion of manslaughter and conspiracy to traffic people, but have been released on bail, Essex Police said on Sunday.
They include a man, 38, and a woman, 36, from Warrington, Cheshire, who were arrested on Friday, and a 46-year-old Northern Irish man who was arrested at Stansted Airport on the same day.
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Essex Police confirmed another man arrested in Dublin by Irish police over an unconnected matter on Saturday "is a person of interest" in their investigation and they are liaising with them as the man is outside England and Wales' jurisdiction.
Detectives are now trying to identify the 31 men and eight women discovered in the trailer in the largest identification process in Essex Police history.
The lorry was moved to Tilbury Docks after the initial discovery and the bodies have now been moved to Broomfield Hospitla in Chelmsford, where post-mortems will be carried out.