Students from London Metropolitan University have staged their latest protest against the decision that could jeopardise their futures.
Five hundred are currently affected by the ban on the university recruiting from outside the European Union, after the UK Border Agency ruled it was not making proper checks on students.
They are now awaiting the outcome of a legal challenge against that ban.
Ronke Phillips reports.
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David Cameron said the Met proved it can "do more with less" and declined to criticise the Mayor of London for his water cannon spend.
A group of disabled activists threw toys and balls at him as he entered the conference.
A wet start to the week and the unsettled weather is set to continue over the next few days.