Are those just the detention centre people?
Anyway my mate is still actually commuting as he lives in Folkestone and as he says many of his shifts are very commutable ...and he plays gigs in Kent on his nights off.
He says some stay over, a few he mentioned have relationships in Calais area. ...but as he says for him a several others he works with it is an easy commute, better than commuting to london.
It is just an ordinary job, and people make their own way of doing it...no blanket statement.
Mind you, he is thinking of getting out...very understaffed, little recruitment, no forward thinking from management and a lot of abuse from passengers