Last month Spanish newspaper El Pais reported that a major factor in the increase in detainments was the dismantling of the so-called ‘Calais Jungle’, where many foreign nationals had set up camp.
A Home Office spokesman said: “Working with our law enforcement partners at home and abroad we use intelligence to keep our borders secure.
“We have also invested in new detection technology and are working with port operators to improve the controlling, screening and processing of unauthorised arrivals.”
Portsmouth City Council leader Councillor Donna Jones said: “We are very grateful for the efforts made by Brittany Ferries and Border Force to tighten security around ports to ensure people are not entering the UK illegally.
“The council has the responsibility to look after unaccompanied asylum-seeking children so any entering the country illegally, without a genuine need for asylum, place an additional burden on our already limited financial resource.”
Source: Daily telegraph, 24 September 2017