CALAIS, FRANCE - JANUARY 07: A concrete wall secures the main motorway into Calais Port to prevent migrants climbing on trucks on January 07, 2019 in Calais, France. In recent weeks there has been an increase in migrants, many claiming to be from Iran, making the sea crossing from France to the UK in small vessels that have often been intercepted or rescued. Many of the migrants are increasing their efforts to cross the English Channel before the brexit deadline of March 29th 2019, believing it will be more difficult after. (Photo by Christopher Furlong/Getty Images)
