It would be absurd to say that there are no problems with the student visa system. It represents two thirds of the amount of immigration into the system, and it has become the biggest single loophole in our immigration system. On the slightly arcane theology of impact assessments, my hon. Friend will know that some strange assumptions have to be made by Government economists. For instance, this has to be costed on the assumption that if migrant students are no longer able to work here as before, not a single one of the jobs that they vacate will be taken up by a UK citizen, particularly one who may be currently unemployed. If there is replacement, which is intuitively very obvious, then the cost to the economy will be significantly lower. That is why we have asked the Migration Advisory Committee to investigate this assumption, and we expect it to report in November.