There would be 600,000 non-EU students a year by the next decade, she said. Each year 121,000 non-EU students arrive and only 51,000 leave.

她说：“在未来的十年里非欧盟的留学生人数每年会达到600，000，每年到英国的留学生人数有121，000人，但是最后离开的只有51，000人。

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The university's licence to sponsor non-EU students was controversially revoked in August last year, leaving hundreds of students without courses.

BBC: London Met wins back foreign student licence

Last year, 63% of non-EU students at the London campus accepted job offers within three months of graduation, compared with 84% of those with EU citizenship.

WSJ: For Hire: Foreign Business Students

For example, the student visa system, which admits half a million non-EU students a year, needs a much more effective means of testing whether the applicants are genuine and intend to return home.

BBC: Migrations figures remain steady