Avon and Somerset police have released a 50-year-old man on bail following his arrest in connection with a lorry carrying 15 people near Ilminster.
ITV News understands he is the driver of the lorry.
A force spokesman said: "A 50-year-old man has been released on police bail pending further enquiries. He was arrested yesterday on suspicion of facilitating entry of people into the UK. 15 people who were found in the back of a lorry remain in a rest centre."
More top news
Vic Reeves and Bob Mortimer have promised 'uplifting moments', 'some magic' and 'dancing styles' on their first tour for two decades.
Another freezing, frosty and icy night ahead but this will be followed by a dry and sunny day for most tomorrow.
Phone hacking was "rife" at the Daily and Sunday Mirror newspapers and the People by mid-1999 at the latest, the High Court has heard.