Labour leader Ed Miliband has said the the government's handling of the immigration system is "turning into a shambles", following reports that language certificates that offer smooth entry in the UK are being sold illegally for £500.
"We want tough controls, we want the right controls to be in place," he said. "I think we need urgent answers on what has been going on here."
The Home Office takes any allegation of fraud extremely seriously and we have already begun a full investigation. We will take the strongest possible action against anyone who is found to have abused the rules - including the possibility of criminal prosecutions for fraud.
This ESOL certificate is just one element of a wide range of evidence required by individuals applying for settlement and citizenship. Nobody can gain a UK visa on the strength of this qualification alone.
Language certificates that offer a gateway to British citizenship are being sold illegally for £500, according to an investigation by the Daily Mail.
The newspaper claims that Learn Pass Succeed, a London language school, offers migrants a "guaranteed pass" on the Entry 3 Level ESOL exam, with staff allegedly taking the tests in place of applicants who are not even required to attend.
The exams are designed to test migrants' ability to speak English to a basic level and are a requirement for anyone who wishes to apply to be a British citizen
The Home Office has announced an urgent investigation in response to the claims, while the school has since been suspended by the examining body, the Mail reports.