Around 500 college students just charged down Whitehall from Trafalgar Square only to be met by a wall of police.
The police had been hidden down a side street and emerged as they saw the protesters charging.
The protesters then returned to Trafalgar Square and were last reported to be heading toward Buckingham Palace.
One observer remarked on the incident as being: “Very French revolution.”
Few University of London students are currently at Trafalgar Square, although a delegation from Queen Mary has been scene and student from UCL and SOAS are en route.