The doors of a lorry found containing 15 people suffering from possible dehydration near Ilminster was opened in the French port of Calais for nine minutes, sources tell ITV News.
ITV News producer Sandi Sidhu has tweeted:
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Drying up across eastern parts this afternoon with showers continuing across Ireland.
Gordon Brown has said forced child migration schemes that continued until the 1970s amounted to "government-induced trafficking".
200 UK officers already working on the case are sifting through 15 tonnes of debris on each of the building's 24 floors.