The owners of a lorry found containing 15 people near Ilminster take incidents of human trafficking "very seriously," a spokesperson said.
The Thermotraffic spokesperson added: "At the moment we are in close contact with the British public authorities and support them to investigate the situation."
A German national has been arrested on suspicion of facilitating the unlawful entry of people into the UK. He is understood to be the driver of the lorry.
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The entertainer, 65, brought the legal action against Essex police over a wrongful arrest which he says destroyed his career.
The Holby City star, who had been visiting Barcelona, detailed the events of the attack on Twitter as they unfolded.
Searches are continuing for victims, with around 600 people still missing and 3,000 left homeless after the disaster.