The British and French governments are discussing the creation of a new immigrant holding centre within the Calais docks which would be "inside Britain" under immigration law and allow cross-Channel asylum-seekers to be shipped back to their home countries easily.
Although no details have yet been agreed, the idea is to exploit the ambiguous legal status of a British "control zone" of the Calais port, created in 2003, to cut through the mesh of legal difficulties which prevent asylum-seekers from being expelled to their countries of origin.
The holding centre would potentially allow London and Paris to use the ambiguous status of the British "control zone" at Calais to send the migrants home. If agreed, the centre is likely to attract the scrutiny of civil liberties and human rights groups.