1) Most illegal immigrants arrive legally on a visa or visa-free and overstay. This is enabled by the fact that the UK does not track people leaving the country, which creates complications for proving that the person has over-stayed.
1) Most illegal immigrants arrive legally on a visa or visa-free and overstay. This is enabled by the fact that the UK does not track people leaving the country, which creates complications for proving that the person has over-stayed.