A systematic fraud has been discovered in Britain's student visa system, allowing thousands of foreigners into the country each year.
The Home Office has suspended English language tests run by a major firm after BBC Panorama uncovered systematic fraud in the student visa system.
The secret filming of government-approved exams needed for a visa shows candidates having tests faked for them.
According to the BBC, ETS, which sets the exams but does not appoint the invigilators, told Panorama it does everything it can to detect and prevent cheating.
Home Secretary Theresa May said the evidence revealed by the BBC was 'very shocking'.
Panorama saw candidates for tests set by ETS, one of the largest language testing firms in the world, being replaced by 'fake sitters' and having answers read out to them, the report added.