Irregular migration to the UK "is increasing", an anti-trafficking expert said.
Andy Desmond, Director of Anti-Trafficking Consultants, told Good Morning Britain that the hot weather simply makes cases, such as those of migrants in lorries, "more overt because of their own distress."
Following the discovery of 35 Afghan Sikhs in a shipping container at Tilbury Docks at the weekend, a lorry has been discovered carrying 15 migrants with suspected dehydration in Somerset. The German driver has been arrested.
More top news
Pebble's new Time smartwatch has become the most funded project ever on crowd-funding site Kickstarter after raising more than £10 million.
A mother who revelled in the attention having a poorly child brought has been convicted of poisoning her son to death.
The Newcastle-based bakers made £1m a week in coffee sales in the period leading up to Christmas.