Deportations have fallen 42 per cent in past four years, with 27 per cent drop of removals in past 12 months

Cameroon migrant was convicted of robbery in 2015 and sentenced to 34 months in prison 

Asylum seeker, 30, with 18 convictions and a history of violent crime is fighting to stay in the UK 

21-year-old man from Afghanistan sentenced to just two years and two months in prison