The House of Commons' Home Affairs Select Committee, chaired by Indian-origin Labour MP Keith Vaz, launched the inquiry into the UK Home Office response to the cheating scandal at a hearing on Tuesday.
"This is a devastating verdict on ministers and officials at the Home Office. It is clear that there are many innocent people who speak impeccable English who have been denied their right to remain in the UK because of the (over) reaction of the Home Office," Vaz said.
The cheating scam was uncovered by a 'BBCPanorama' investigation in February 2014. It revealed that immigration consultancies and international education agencies were charging fees to help international students with poor English get around English language tests (TOEIC) required for student visas and visa extensions.
An ensuing investigation by the Home Office claimed widespread problems with the test system and the National Union of Students (NUS) believes around 100 educational institutions were subsequently closed.