My bad, sorry.
It's an idea well worth piloting provided the admin costs work out.
I just wonder whether it will be effective in practice.
After all, people intent on deception seem to be able and prepared to find money to pay criminal gangs. If they can afford to get say £3000 together it may actually be cheaper for those who would find other entry routes. Lets see.
I'd much prefer to see a bigger effort to tackle the issue at source before they actually arrive here.