Fraud in student visa system exposed
10 February 2014 Last updated at 00:53 GMT
The Home Office has suspended English language tests run by a major firm after BBC Panorama uncovered systematic fraud in the student visa system.
Researchers secretly filmed a range of abuses including cheating in government-approved English exams, with entire rooms of candidates having their tests faked for them.
The English Testing Service - one of the largest language testing firms in the world - said it did all it could to prevent fraud.
Panorama: Immigration Undercover - The Student Visa Scandal will be broadcast on BBC One at 8.30pm on 10 February