Andrew Farotade's case shows what the UK's "hostile environment for immigrants" means in practice.

I don't think it is mere imperfection that leads officials to make so many mistakes — always to the immigrants' detriment -- nor that it is a coincidence that they have to bankrupt themselves trying to get those mistakes corrected. I think officials designed this scheme, knowing that it would chase out lots of immigrants and that they could get away with that all they were doing was carrying out laws and that each expulsion was justified.

The officials who planned this didn't do it from mere spite, although they may feel some. Surely they were directed from higher up to increase the frequency of expulsions and "Don't tell us how."