More than 2,000 students potentially face deportation after a university had its licence to teach and recruit students from outside the EU revoked.
The UK Border Agency (UKBA) says student attendance at London Metropolitan University is not being monitored and that many have no right to be here.
As a result, the university will no longer be allowed to authorise visas.
The university said it would be challenging UKBA’s claims.
A task force has been set up to help students affected by the decision which means some 2,000 overseas non-EU students will have to find an alternative institution to sponsor them or face deportation.