Students at Westminster University went into occupation on Monday this week to protest against the huge cuts proposed by management.
On Tuesday students held a demonstration in solidarity with the occupation.
There is widespread support for the occupation among staff and students. But security staff have been ordered to stop occupiers from using the toilet.
Management are also threatening repercussions.
A mass meeting has been called at Westminster on Thursday. The campaign is part of resistance against cuts in higher education across the country.