Members of the Unite Against Facism group demonstrated outside Cambridge University's Student Union this afternoon (Tuesday).
They were protesting against an appearance by Marine Le Pen, who leads the far-right French political party Front National.
She took over from her father Jean-Marie Le Pen in 2011. The Union Society is well known for hosting controversial speakers. In the past they've included the former IMF chief Dominique Strauss Kahn, and the founder of Wikileaks Julian Assange.