Thirty-five people found inside a shipping container at Tilbury Docks had travelled on a P&O commercial ferry from Zeebrugge in Belgium.
The group - believed to be of Indian origin - arrived at the docks at around 6am this morning and were discovered when the ship was being unloaded.
One man has died and 34 others - including children - have been taken to hospitals suffering from severe dehydration and hypothermia.
The uncle of dead Afghan immigrant Meet Singh Kapoor says he wanted a better life for his children. Instead his children watched him die.
ITV News has spoken to the translator police used after 35 Afghan Sikhs, including 13 children, were found in a boat in Tilbury Docks.
ITV News has obtained exclusive footage of people, believed to be Afghan Sikhs, being released from a shipping container at Tilbury Docks.