A container truck in Britain found 39 bodies. What happened?

The 39 people who died in the train were illegal immigrants who sneaked into Britain from China. At present, it has been found that their causes of death are suffocation and long-term low temperature environment. Presumably, the truck driver's operation error caused the compartment ventilation system to be turned off by mistake (the compartment and the front of the truck are separated, and the compartment belongs to the refrigerated compartment, which is extremely sealed, so even if the personnel in the compartment slam the compartment hard, the driver can't hear the sound). The British police concluded that the stowaway found an unreliable snakehead, arranged for a novice driver to drive the truck, and rented a refrigerated carriage that was not suitable for carrying people. However, although the truck driver took the initiative to call the police, it does not rule out that the price has not been negotiated and the case is under further investigation.